Every source behind the read

46 sources in Teams and technical leaders, with product documentation Showing all 103 sources

1. No opinion stated

   Ok-Balance6208, Reddit poster

   Best langfuse alternative with evals and governance built in? new customer says no data outside the EUReddit post, r/LangChain

   After about a year on Langfuse for traces and prompts with no complaints about tracing, the team got an enterprise contract requiring EU-only data. Self-hosting in the EU would leave its two platform engineers owning uptime and patching, so it is looking at alternatives and weighing the cost of moving a year of prompt history.

   "Been on langfuse for traces and prompts for about a year with zero complaints on the tracing tbh."

   Published Oct 26, 2026self-described: Two-person platform team; a new enterprise customer's contract requires EU-only data

   Published on

   Developer Communities

   Who

   Small product team

   Evidence

   Reported

   Applies to

   Current

2. No opinion stated

   Jack Rudenko, CTO at MadAppGang (X profile)

   Reply on X about cost tags on agent tracesX post

   Says cost tags must be on traces from the first run, since last month's traces cannot be tagged once the bill arrives, and that most frameworks in MadAppGang's evaluation left this to the team, with Langfuse added afterwards.

   "@ali_buildss @boristane Agreed, and the tag has to be there from the first run, because you can't add it to last month's traces when the bill arrives. Most frameworks in our evaluation left that part to you, with Langfuse bolted on afterwards."

   Published Oct 23, 2026self-described: MadAppGang's evaluation of agent frameworks

   Published on

   Developer Communities

   Who

   Technical leadership

   Evidence

   Reported

   Applies to

   Current

3. Mixed

   nimrodbusany, Traigent maintainer

   fix(langfuse): read traces via Observations API v2 before Langfuse Cloud's v4 cutoverGitHub pull request

   Moves Traigent's Langfuse connector to the Observations API v2 because Langfuse Cloud removes the trace and v1 observation read endpoints on November 16, 2026.

   Published Oct 7, 2026self-described: Traigent SDK's Langfuse connector

   Counts toward

   • Overall signal
   • Upgrades & Migrations: Raised as a concern
   • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Use Langfuse Cloud

   Published on

   Developer Communities

   Who

   Small product team

   Evidence

   Reported

   Applies to

   Current

   Observed on

   Langfuse Cloud v4 cutover

4. Mixed

   Chris (chrizefan), owner and approver of tooling decisions at digithings.ai

   epic: digitrace rename + self-hosted Langfuse on Cloudflare (cut LangSmith)GitHub issue

   Approved self-hosted Langfuse on Cloudflare to replace LangSmith behind a pluggable OpenTelemetry layer, then on October 9, 2026 dropped Langfuse for Cloudflare-native tracing with MLflow to avoid new paid services, keeping LangSmith until a parity run.

   Published Oct 1, 2026self-described: digithings.ai LangGraph workloads

   Counts toward

   • Overall signal
   • Instrument with OpenTelemetry
   • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool

   Published on

   Developer Communities

   Who

   Technical leadership

   Evidence

   Reported

   Applies to

   Current

   Observed on

   self-hosted Langfuse planned, then dropped, with LangGraph

5. Mixed

   Jérémie Doucy, contributor to the Bayes Impact platform

   feat(observability): export traces over OTLP and link them to Phoenix instead of LangfuseGitHub pull request

   Moved Bayes Impact's platform off a 673-line Langfuse exporter to plain OTLP sent to Phoenix, with a plan to keep Langfuse read-only for 30 days until both hold the same trace history; production on Cloud Run exports nothing with this version yet.

   "…the platform emits standard OTLP and knows no trace backend. The OpenTelemetry Collector does the mapping to OpenInference and sends the LLM traces to Phoenix."

   Published Sep 29, 2026self-described: Bayes Impact platform, staging and production

   Counts toward

   • Overall signal
   • Instrument with OpenTelemetry
   • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool

   Published on

   Developer Communities

   Who

   Product or platform team

   Evidence

   Reported

   Applies to

   Current

   Observed on

   Langfuse exporter replaced by plain OTLP to Phoenix

6. Mixed

   alexosugo, contributor to Medic's cht-agent

   feat(#126): migrate Langfuse to JS SDK v5 for the v4 observations modelGitHub pull request

   Medic's CHT agent moves its new Langfuse tracing from the v3 npm package to the OpenTelemetry-based JS SDK v5 because Langfuse Cloud removes legacy batch ingestion on November 16, 2026.

   "…migrates the Langfuse tracing added there from the legacy langfuse v3 npm package to the OpenTelemetry-based JS SDK v5…"

   Published Sep 23, 2026self-described: Medic's Community Health Toolkit agent

   Counts toward

   • Overall signal
   • Upgrades & Migrations: Raised as a concern
   • Instrument with OpenTelemetry

   Published on

   Developer Communities

   Who

   Product or platform team

   Evidence

   Reported

   Applies to

   Current

   Observed on

   JS SDK v5

7. Positive

   Thang Chung, Engineer at Tiger Tribe (HEINEKEN)

   Set up a .NET application w/th OpenTelemetry, and trace/evaluate in Langfusedev.to article

   Their company shortlisted Langfuse and Microsoft Foundry; Langfuse's OpenTelemetry ingestion lets them instrument .NET and other languages with the official OTel SDKs.

   Published Sep 21, 2026self-described: AI-infused products across the company

   Counts toward

   • Overall signal
   • Integrations & Setup: Positive
   • Instrument with OpenTelemetry

   Published on

   Engineering Blogs & Reviews

   Who

   Product or platform team

   Evidence

   Reported

   Applies to

   Current

   Observed on

   OpenTelemetry, .NET

8. Positive

   Uttam Kumaran, Founder & CEO, Brainforge

   How we migrated to Langfuse v4 ahead of the cutoverCompany engineering blog post, Brainforge blog

   Brainforge moved its agent platform to Langfuse v4 in August 2026, three months before the Cloud cutover. The v4 move caused the costliest of the 18 integration problems it logged, and the team found v4 measurably faster to query.

   "Coexisting OTEL providers is the real fight. We run HyperDX and Langfuse in one process, and the two pull against each other on the global tracer provider and conflicting OpenTelemetry version lines."

   Published Sep 18, 2026Brainforge agent platform with Mastra agents, chat routes, voice traces, and Cloudflare workers on Langfuse Cloud

   Counts toward

   • Overall signal
   • Upgrades & Migrations: Raised as a concern
   • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Use Langfuse Cloud

   Published on

   Engineering Blogs & Reviews

   Who

   Technical leadership

   Evidence

   Reported

   Applies to

   Current

   Observed on

   Langfuse Cloud v4, JS/TS SDK

9. Positive

   Ryan Delgado and David Traina, Ryan Delgado (Engineering) and David Traina (Data Platform), Ramp

   How Ramp uses Langfuse: Observing, debugging, and continuously improving production AI agentsConference talk (hosted by ClickHouse, Langfuse's parent company), ClickHouse on YouTube

   Ramp traces its agents in self-hosted Langfuse, and its Reflect agent scores and clusters those traces to propose fixes. Reflect covers 12 agents and 120+ merged suggestions; on the Research agent alone, 60+ merged suggestions cut tokens 10 to 20%, tool calls 15% and session time 30%.

   Published Sep 17, 2026self-described: Ramp, agents across expense, close, and an internal coding agent; self-hosted Langfuse

   Not counted

   Published on the YouTube channel of ClickHouse, which owns Langfuse. Kept in the record; it takes part in no figure.

   Published on

   Podcasts, Talks & Videos

   Who

   Product or platform team

   Evidence

   Measured

   Applies to

   Current

   Observed on

   Self-hosted Langfuse on S3, Redis, Postgres, ECS, and ClickHouse Cloud

10. No opinion stated

    Jiří Spilka (jirispilka), Engineer at Apify

    chore(evals): Delete the Phoenix eval runnerGitHub pull request

    Apify deleted its Arize Phoenix eval runner from the MCP server after Langfuse-based two-tier gates replaced it, because the runner's custom loop could not represent built-in tool competition or Claude Code's prompting, so its verdicts did not transfer.

    Published Sep 14, 2026self-described: Apify MCP server evals

    Counts toward

    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse

    Published on

    Developer Communities

    Who

    Product or platform team

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Langfuse-based two-tier eval gates

11. Mixed

    TheConnMan, maintainer of Curie

    ADR: record the Langfuse swap-cost decision with a named revisit triggerGitHub issue

    Asks for an ADR keeping Langfuse as the shipped trace store. The ClickHouse templates and pricing seeds cost more than the product reads, but its trace UI and cost engine are what the product uses.

    Published Aug 29, 2026self-described: Curie product shipping Langfuse as its trace store

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Technical leadership

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted, bundled in a Helm chart

12. Mixed

    HectorPascual, developer (issue author)

    bug: v4 unified Tracing table cannot display trace total cost - root SPAN rows show $0.00GitHub issue

    In the v4 tracing table, root span rows of their LangGraph agent show US$0.00, so trace cost is visible only inside each trace, unlike the earlier traces table.

    Published Aug 13, 2026self-described: LangGraph agent in production

    Counts toward

    • Overall signal
    • Upgrades & Migrations: Raised as a concern
    • SDK & UI Reliability: Raised as a concern

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Current

    Observed on

    v4 UI

13. No opinion stated

    Arun Joseph, co-founder & CEO of Masaic, former head of AI engineering at Deutsche Telekom

    Architecting AI Systems for the Messy Reality of Enterprises: Why Agentic Compute is the Missing LayerConference talk with transcript, InfoQ Dev Summit Munich 2025

    Shows an agent platform whose collector fans OpenTelemetry out to Langfuse or any other backend, so application developers never write tracing code for a specific tool.

    Published Aug 3, 2026Enterprise agent platform that exports OpenTelemetry from the collector

    Counts toward

    • Instrument with OpenTelemetry

    Published on

    Podcasts, Talks & Videos

    Who

    Technical leadership

    Evidence

    Reported

    Applies to

    Current

14. Positive

    Drasko Profirovic, Staff Engineer, Pinterest

    Medic for Apache Spark - First Aid for Failing JobsConference talk with transcript, AI Engineer World's Fair 2026

    The Medic team publishes the agent's OpenTelemetry traces to Langfuse and reads each run as a waterfall of steps to find what caused a weak diagnosis. It then grades prompt changes with offline evals in its own replay harness.

    "To improve the system, we invested in observability and testability. We used OpenTelemetry to publish traces to Langfuse, and by viewing the agent's execution as a waterfall diagram of steps, we could better understand the cause of lower quality responses."

    Published Jul 20, 2026Pinterest's Medic agent, which diagnoses failing Spark jobs through MCP tools over job logs and metrics

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • LLM apps need tracing

    Published on

    Podcasts, Talks & Videos

    Who

    Product or platform team

    Evidence

    Reported

    Applies to

    Current

    Observed on

    OpenTelemetry

15. Positive

    Total_Listen_4289, Reddit user, r/LLMDevs

    Spent 3 months evaluating Galileo, Arize, Langfuse and LangSmith for production LLM monitoring. Notes for anyone doing the same.Reddit post

    After three months comparing Galileo, Arize, Langfuse, and LangSmith, the team chose Langfuse because it could self-host the full product and it speaks OpenTelemetry. Tracing, prompts, evals, and annotation also sit in one place. The cost is one more stateful service to run.

    Published May 30, 2026self-described: Small team shipping agents, evaluating observability for production

    Counts toward

    • Overall signal
    • Open Source & Self-Hosting: Positive
    • Self-Hosting Operations: Raised as a concern
    • Open source decides the choice
    • Instrument with OpenTelemetry
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Self-hosted Langfuse

16. Positive

    Sonny Merla, Global Data Science & AI Manager, Amplifon

    One Registry to Rule them AllConference talk with transcript, AI Engineer Europe 2026

    Amplifon deployed Langfuse at the platform level of its AmplifAI program, so development teams that start from its MCP and A2A blueprints trace their agents and run evaluations from day one.

    Published Apr 10, 2026Amplifon's AmplifAI program, co-presented with Quantyca engineers who built its MCP and A2A blueprints

    Counts toward

    • Overall signal
    • Datasets & Evaluations: Positive
    • Integrations & Setup: Positive

    Published on

    Podcasts, Talks & Videos

    Who

    Organization-wide

    Evidence

    Reported

    Applies to

    Current

    Observed on

    platform-level deployment

17. Positive

    James Idzik, Software Engineer at Cresta

    Observability for AI Agents: Tracing Multi-Service LLM Pipelines with LangfuseEngineering blog post (co-written with Langfuse), Cresta engineering blog

    Cresta self-hosts one Langfuse instance per Kubernetes cluster with one organization per customer, and propagates trace context across Go and Python services over gRPC. It deletes traces after four weeks and uses the trace tree to find the step where an agent chain went wrong.

    "We self-host Langfuse rather than using a managed SaaS offering."

    Published Mar 26, 2026self-described: Cresta, AI agents for customer conversations, self-hosted Langfuse per Kubernetes cluster

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • Open Source & Self-Hosting: Positive
    • LLM apps need tracing
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Engineering Blogs & Reviews

    Who

    Product or platform team

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Self-hosted Langfuse, one instance per Kubernetes cluster, one organization per customer

18. Mixed

    tjain1511, developer (issue author)

    Allow using metadata fields (e.g. organizationId) as Breakdown Dimension in Dashboard WidgetsGitHub issue

    Monitoring a multi-tenant product, the team cannot break dashboard widgets down by a metadata field such as organizationId, so it gets no per-customer cost or latency breakdown.

    Published Mar 16, 2026self-described: Multi-tenant product

    Counts toward

    • Overall signal
    • Feature Gaps: Raised as a concern

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Dashboards

19. Positive

    mfundn, developer on bbvch-ai's AI Hub

    feat(aihub): Replace Arize Phoenix with LangfuseGitHub pull request

    The AI Hub team replaced Phoenix with Langfuse for agent tracing and datasets, moving its tracer to OpenTelemetry and Langfuse spans and provisioning Langfuse automatically.

    "Migrate tracing to use OTEL & Langfuse spans…"

    Published Feb 10, 2026self-described: bbvch-ai AI Hub, agent tracing and datasets

    Counts toward

    • Overall signal
    • Instrument with OpenTelemetry
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Langfuse spans over OpenTelemetry, Langfuse datasets

20. Mixed

    agsqwe, Hacker News commenter

    Comment on: ClickHouse acquires LangfuseHacker News comment

    Likes Langfuse for observability over OpenTelemetry but finds its prompt management too basic for the team's needs.

    Published Jan 18, 2026self-described: Hacker News thread: ClickHouse acquires Langfuse

    Counts toward

    • Overall signal
    • Prompt Management: Mixed or negative
    • Integrations & Setup: Positive
    • Feature Gaps: Raised as a concern

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Current

    Observed on

    OpenTelemetry

21. Mixed

    axpy906, Hacker News commenter

    Comment on: ClickHouse acquires LangfuseHacker News comment

    Chose PromptLayer for prompt management because they needed a git-like prompt API with release labels and rollback, while finding Langfuse much better at tracing.

    Published Jan 18, 2026self-described: Hacker News thread: ClickHouse acquires Langfuse

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • Prompt Management: Mixed or negative
    • Feature Gaps: Raised as a concern
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Current

22. Mixed

    hobofan, Hacker News commenter

    Comment on: Lightpanda migrate DOM implementation to ZigHacker News comment

    In their MCP server stack the ClickHouse shard that comes with self-hosted Langfuse uses more memory than anything else, more even than headless Chrome.

    Published Jan 12, 2026self-described: EratoLab, MCP server stack

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted

23. Mixed

    jkisiel, Hacker News commenter

    Comment on: LLM Observability in the Wild, Why OpenTelemetry Should Be the StandardHacker News comment

    Evaluated many tools for a small startup early in 2025 and chose Arize Phoenix, the one that worked out of the box with OpenTelemetry, over Langfuse and others.

    Published Sep 28, 2025self-described: Small startup

    Counts toward, pending a recheck

    • Overall signal
    • Instrument with OpenTelemetry
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Needs a recheck

24. Positive

    Jetze Schuurmans, Machine Learning Engineer, Xebia

    Setting up a local Langfuse server with Kubernetes to trace Agentic systemsEngineering blog post, Xebia blog

    The team self-hosts Langfuse on its local GPU cluster with Helm and Kustomize so traces from sensitive applications never leave its network. It calls Langfuse a great open-source framework for traces, evals, and prompts.

    Published Jul 9, 2025self-described: Xebia team's local GPU cluster for sensitive LLM applications

    Counts toward

    • Overall signal
    • Open Source & Self-Hosting: Positive
    • Open source decides the choice
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Engineering Blogs & Reviews

    Who

    Product or platform team

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    self-hosted, Helm chart 1.2.5

25. Positive

    azath92, Hacker News commenter

    Comment on: Show HN: HomeBrew HN, Generate personal context for content rankingHacker News comment

    The team is exploring Langfuse for tracing a Vercel AI SDK app, likes it so far, and plans to use it for first-pass evals.

    Published Jul 3, 2025self-described: Small team, side project

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    with Vercel AI SDK

26. Mixed

    Kyle Rush, Maker of Astrid: Personal Shopping Agent

    Review of LangSmith by Kyle RushProduct Hunt review

    Their team considered Langfuse but chose LangSmith for traces, datasets, annotation queues, and evals because Rush already knew it.

    Published Jun 22, 2025self-described: Astrid shopping agent team

    Counts toward

    • Overall signal
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool

    Published on

    Engineering Blogs & Reviews

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Still applicable

27. Mixed

    suninsight, Hacker News commenter

    Comment on: Building Effective AI AgentsHacker News comment

    NonBioS builds most tooling in house and uses only Langfuse for observability, which was breaking down for them at their volume; they hoped v3 would hold up.

    Published Jun 19, 2025self-described: NonBioS, AI engineering agent

    Counts toward, pending a recheck

    • Overall signal
    • Upgrades & Migrations: Discussed without concern
    • SDK & UI Reliability: Raised as a concern

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Needs a recheck

28. Mixed

    benm5678, developer (issue author)

    Languse V3 Clickhouse Cpu ConsumptionGitHub issue

    Since v3, ClickHouse spikes CPU even when Langfuse is idle, which ended the team's practice of running it in Docker Desktop for developers.

    Published Apr 23, 2025self-described: Team running Langfuse locally for developers

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • Upgrades & Migrations: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Small product team

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    self-hosted v3

29. Positive

    Nik Caryotakis, Staff Software Engineer, SuperDial

    Voice AI: Your Bot Isn't SpecialConference talk with transcript, AI Engineer Summit 2025

    SuperDial self-hosts Langfuse for all logging and observability on its healthcare phone calls because the calls must meet HIPAA, and uses it for anomaly detection and evals.

    "And then all of our logging and observability, we self-host Langfuse, and we self-host these things also because these are like healthcare calls."

    Published Apr 18, 2025SuperDial voice agents that place long healthcare phone calls, with a TensorZero gateway in front of the models

    Counts toward

    • Overall signal
    • Open Source & Self-Hosting: Positive
    • Open source decides the choice
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Podcasts, Talks & Videos

    Who

    Product or platform team

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    self-hosted

30. Positive

    Amit, NonBioS author

    The NonBioS LLM Observability PickCompany blog post, NonBioS blog

    After studying a dozen tools, NonBioS narrowed to Langfuse and Helicone and chose Langfuse for maturity, open source it can extend, session tracking, and prompt version control.

    "Session tracking capabilities significantly impacted our decision. Langfuse offers a tracing feature that connects sequences of LLM calls to single sessions. This aligned well with our needs and appeared straightforward in initial testing."

    Published Mar 5, 2025self-described: NonBioS AI engineer product

    Counts toward

    • Overall signal
    • Prompt Management: Positive
    • Open source decides the choice
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse

    Published on

    Engineering Blogs & Reviews

    Who

    Product or platform team

    Evidence

    Reported

    Applies to

    Still applicable

31. Positive

    Shawn Jansepar, Director of AI and Learning, Khan Academy (self-described)

    Scaling AI in Education: A Khanmigo case studyConference talk with transcript, AI Engineer World's Fair 2024

    Khan Academy's AI platform team built a Go component interface so any Khanmigo feature that conforms gets tracing in Langfuse. Engineers now open a failing case's stack trace in Langfuse and debug from there.

    "…we recently built this component interface in Go that when you as a developer conform to that component interface, it automatically think-- means that things like tracing and Langfuse are available as long as you conform."

    Published Feb 5, 2025Khanmigo AI tutor, where an AI platform team owns the developer experience for product teams

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive

    Published on

    Podcasts, Talks & Videos

    Who

    Technical leadership

    Evidence

    Reported

    Applies to

    Still applicable

32. No opinion stated

    jack_bing, Hacker News commenter

    Comment on: Ask HN: Has anyone used Phoenix, Langfuse, or OpenObserve?Hacker News comment

    Finds Langfuse and Logfire much alike and both limited for custom graphs, with Langfuse offering the broader feature set through evaluation and prompt management.

    "I used both Langfuse and Logfire. Imo both very similar, and at the same time limited when you want to customize graphs. Langfuse in general has broder feature set (however I used Logfire long time ago so it might have changed) like evaluation and prompt management…"

    Published Oct 28, 2026self-described: Has used both Langfuse and Pydantic Logfire

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

33. No opinion stated

    Applied_AI, Hacker News commenter

    Comment on: Ask HN: Has anyone used Phoenix, Langfuse, or OpenObserve?Hacker News comment

    Says observability alone is easy to move to or from Langfuse while its other features lock a team in more, and that agent traces take a few minutes to become explorable, too slow for anyone who needs them within milliseconds.

    "If you only want observability then it is save and easy to switch to/from LangFuse. Other features (if you care about) are more lock-in. Also, it take some times for LangFuse to process spans and traces from the agents, so if you want to have visibility in milliseconds then that is not the option for you. But if few minute gap before code execution and traces being available to explore is not a problem, then Langfuse is good. Other than that I did not observe problems with it."

    Published Oct 28, 2026self-described: Traces agents in Langfuse

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

34. No opinion stated

    Yash Solanki, X user

    Post on X asking about self-hosted LLM observabilityX post

    Uses Langfuse today and is looking at OpenObserve or Arize Phoenix for something lighter that can run on Cloudflare's infrastructure.

    "Has anyone tried solutions like openobserve or arize phoenix for self hosted LLM observability. I use langfuse at the moment but looking for something lightweight that can be done on the cloudflare infra. lmk…"

    Published Oct 27, 2026self-described: Uses Langfuse and wants a lighter self-hosted tracer on Cloudflare

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

35. No opinion stated

    Jimothy de la Cruz, Senior Software Engineer (X profile)

    Reply on X about Phoenix and LangfuseX post

    Found Phoenix far less to look after than Langfuse when the author tried both.

    "@YashSolanki_ phoenix was way less to babysit than langfuse when i tried it. haven't run openobserve though…"

    Published Oct 27, 2026self-described: Tried both Phoenix and Langfuse

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

36. No opinion stated

    Alan Munirji (alanmun), issue author; Codex filed it on his behalf

    bug: ClickHouse migration 0050 fails on historical Compact scores parts on recommended 26.4GitHub issue

    An upgrade of self-hosted Langfuse from 4.28.1 to 4.70.1 failed at ClickHouse migration 0050 on historical score data, so the new web container never started. It left the database marked dirty at migration 50, which needed schema recovery as well as an image rollback.

    Published Oct 26, 2026self-described: Self-hosted Langfuse in production, upgrading from 4.28.1 to 4.70.1 on ClickHouse 26.4

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted v4, ClickHouse 26.4.5

37. No opinion stated

    kumarpriyanshu09, issue author and past contributor to langfuse/langfuse

    bug: Graph view freezes the browser for seconds on traces with nested spans (quadratic step adjustment in buildStepData)GitHub issue

    kumarpriyanshu09 timed the Graph view on agent traces with nested spans: 1,501 observations took 407 ms to lay out, and 4,001 observations froze the browser tab for 8.5 seconds. Langfuse still offers the view on traces up to 5,000 observations.

    "The tab stops responding for about 1.5 s (about 8.5 s at depth 40)."

    Published Oct 26, 2026self-described: Agent traces with thousands of nested observations

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Measured

    Applies to

    Current

    Observed on

    Langfuse web UI, Graph view

38. No opinion stated

    Haresh, GenAI Engineer (X profile)

    Post on X about self-hosting Langfuse for data residencyX post

    Self-hosts Langfuse inside a client's own Azure tenant because traces carry prompts, retrieved documents and model outputs, and the client's data residency terms rule out hosted tracing.

    "Your LLM traces contain your users' data. Prompts, retrieved docs, model outputs: it all lands in your observability tool. Client needs data residency? SaaS tracing breaks that. So we self-host Langfuse in the client's own Azure tenant. Shipping AI isn't just calling an API."

    Published Oct 21, 2026self-described: Client work with data residency requirements, Langfuse self-hosted in the client's Azure tenant

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted in Azure

39. No opinion stated

    NatureLucky4912, Reddit commenter

    Comment on: Do we really need wrappers like LangChain/LlamaIndex?Reddit comment, r/LangChain

    Used Langfuse to track and test the workflow of a production RAG engine, and Sentry for error tracking.

    "Most definitely , and that's why i used langfuse for tracking the workflow and also for testing , but for tracking errors i did use sentry…"

    Published Oct 15, 2026self-described: Built an end-to-end production RAG engine without LangChain

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

40. No opinion stated

    Ganesh Iyer, AI payments builder and creator of the Nura family assistant (X profile)

    Post on X about getting started with evaluation toolsX post

    Found Arize, Langfuse and Braintrust intimidating to start with, and Langfuse the easiest of them to get going.

    "I have tried out all the existing tools like Arize, langfuse, braintrust etc and almost all of them are quite intimidating to use in the beginning (langfuse was the easier one to get started)."

    Published Oct 13, 2026self-described: Tried Arize, Langfuse and Braintrust while building his own apps

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

41. No opinion stated

    klaus-zzz, issue author

    bug: recurring Worker Redis socket timeouts; upstream ioredis reconnect fix not includedGitHub issue

    After heavy OTLP ingestion, klaus-zzz's self-hosted Langfuse Worker kept logging Redis socket timeouts, some queues repeating the error every 31.5 seconds while the Worker reported Ready and Redis answered. The issue asks Langfuse to ship an upstream ioredis reconnect fix.

    "Some queues subsequently repeat the error approximately every 31.5 seconds while the Worker remains Ready and Redis continues to answer commands."

    Published Oct 10, 2026self-described: Self-hosted Langfuse Worker in production, after heavy OTLP ingestion

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Measured

    Applies to

    Current

    Observed on

    self-hosted, Worker on ioredis 5.10.1

42. Negative

    amruthvvkp, maintainer of DraftPilot

    G11: Temporal replaces ARQ; Langfuse removedGitHub issue

    Removes Langfuse and its six containers from the project's compose stack and sends OpenTelemetry to a Grafana LGTM container instead.

    Published Sep 27, 2026self-described: Personal project stack

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • Instrument with OpenTelemetry
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted

43. No opinion stated

    Niranchana08, issue author

    bug: Data retention mutations accumulate and block async inserts on S3-backed self-hosted ClickHouseGitHub issue

    On Niranchana08's S3-backed ClickHouse, the daily retention job started before the previous one finished, and after 5 days 13 pending mutations sat on the observations table. They held ClickHouse memory until async inserts failed for every project.

    "After 5 days we observed 13 pending mutations on `observations` alone, with the oldest dating back 5 days."

    Published Sep 24, 2026self-described: Self-hosted Langfuse on S3-backed ClickHouse, several projects writing hundreds of traces a minute

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Measured

    Applies to

    Current

    Observed on

    self-hosted, S3-backed ClickHouse, retention policy on

44. Negative

    VimarshDwivedi, contributor to CAMEL

    fix(models): migrate Langfuse integration to v4 SDKGitHub pull request

    CAMEL's integration still imported a context API removed in Langfuse SDK v3 and v4, so fresh installs silently disabled tracing until the pin and code were updated.

    Published Sep 21, 2026self-described: CAMEL agent framework's Langfuse integration

    Counts toward

    • Overall signal
    • Upgrades & Migrations: Raised as a concern
    • SDK & UI Reliability: Raised as a concern

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Python SDK v4

45. Mixed

    99Yash, maintainer of alfred

    Maintenance: complete the Langfuse v4 migration (JS SDK v5) before the 2026-11-16 cutoverGitHub issue

    Langfuse Cloud emailed an action-required notice. The project's dev stack already runs v4 in dual-write mode, but the app SDK is still v3 and must move to JS SDK v5 before November 16, 2026.

    Published Sep 17, 2026self-described: Production on Langfuse Cloud, self-hosted dev stack

    Counts toward

    • Overall signal
    • Upgrades & Migrations: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Use Langfuse Cloud

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Langfuse Cloud, JS SDK v3 to v5

46. Mixed

    tatoalo, contributor to Sure

    chore(langfuse): migrate tracing and experiments to v4GitHub pull request

    Migrates Sure's tracing and evaluation writes to the v4 model before the Cloud cutover, replacing the community Ruby SDK with native OpenTelemetry.

    "Sure currently sends legacy trace updates and dataset-run links that Langfuse Cloud retires on November 16, 2026. This migrates tracing and evaluation writes to the v4 observation model…"

    Published Sep 17, 2026self-described: Sure, an open-source personal finance app

    Counts toward

    • Overall signal
    • Upgrades & Migrations: Raised as a concern
    • Instrument with OpenTelemetry

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Langfuse v4

47. No opinion stated

    jokerleee-ctrl, issue author

    v4 backfill (M3): per-part chunking does not bound memory, full_sorting_merge sorts input/outputGitHub issue

    jokerleee-ctrl's v4 backfill failed with ClickHouse memory-limit errors on a production part of 15.1M rows holding 172 GiB of input and output text, against an 18.63 GiB query memory limit, and retries at any chunk size did not converge.

    "One production part: 15.1M rows, 42.8 GiB on disk, **172 GiB of `input`+`output` text**. Query memory limit 18.63 GiB."

    Published Sep 16, 2026self-described: Self-hosted production Langfuse running the v4 backfill

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Measured

    Applies to

    Current

    Observed on

    self-hosted, v4 backfill

48. No opinion stated

    DanielRuVe, issue author

    Dual-write Event Propagation Job cursor stuck for 48+ hours, no errors loggedGitHub issue

    During DanielRuVe's v3 to v4 upgrade, the dual-write propagation job stopped advancing for more than 48 hours without an error, and the health check did not flag it. 17 traces and 191 observations written after the stuck point were missing from the new v4 tables.

    "Impact measured: 17 traces + 191 observations created after the stuck timestamp are not yet reflected in events_full/events_core."

    Published Sep 14, 2026self-described: Self-hosted Langfuse on EKS with the Helm chart, mid-upgrade from v3 to v4 in dual-write mode

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Measured

    Applies to

    Current

    Observed on

    self-hosted v4.27.0, dual-write mode

49. Mixed

    threecheese, Hacker News commenter

    Comment on: I've operated petabyte-scale ClickHouse clusters for 5 yearsHacker News comment

    Leaving a local Langfuse running for a few months grew its ClickHouse store to terabyte scale on a laptop.

    Published Sep 11, 2026self-described: Local instance on a laptop

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted

50. Positive

    pkuppens, maintainer of healthcare-aigent

    Epic: Explore Langfuse (self-hosted) for LLM engineering & observabilityGitHub issue

    Plans self-hosted Langfuse for a clinical summarization pipeline that has no visibility into per-call latency, cost, or prompt changes today.

    Published Sep 8, 2026self-described: Five-stage CrewAI clinical pipeline

    Counts toward

    • Overall signal
    • Open Source & Self-Hosting: Positive
    • LLM apps need tracing
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted, healthcare

51. Negative

    Titus Lim, data scientist

    Cut local stack from ~47 containers to 14; Langfuse → LangSmithGitHub pull request

    Drops self-hosted Langfuse with its ClickHouse and MinIO containers for hosted LangSmith, part of cutting a local agent template from about 47 containers to 14.

    Published Sep 3, 2026self-described: Agent application template

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted, replaced

52. Mixed

    sakibsadmanshajib, maintainer of hive

    observability: the demo box cannot host self-hosted Langfuse (about 6 CPU and 16 GiB marginal, ClickHouse floor 8 GiB)GitHub issue

    Sized self-hosted Langfuse v4 from its documented minimums and found the project's small shared server cannot carry it, with memory binding first and ClickHouse alone needing 8 GiB.

    Published Aug 29, 2026self-described: Small shared server for the hive project

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted v4 sizing

53. Mixed

    Hugo Lesta (hugolesta), DevOps engineer, home cluster

    Which Bin Goes Out Tonight? Tracing A2A Agents Without Burning Your Free Tierdev.to article

    One bot question produced 278 OpenTelemetry spans and Langfuse's free tier bills every one, so Lesta added a collector filter that cut 79% of the spans.

    Published Aug 14, 2026self-described: Three-agent A2A bot on a home cluster

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • Unit Pricing & Cost: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Use Langfuse Cloud

    Published on

    Engineering Blogs & Reviews

    Who

    Individual builder

    Evidence

    Measured

    Applies to

    Current

    Observed on

    Hobby plan, OpenTelemetry

54. Positive

    Andrew Kaszubski, maintainer of the autonomous-dev Claude Code plugin

    feat: self-hosted OTel observability (Phoenix/Langfuse) for multi-agent tracing - not LangSmithGitHub issue

    Plans multi-agent tracing over OpenTelemetry into a self-hosted open-source backend, Arize Phoenix or self-hosted Langfuse, because the harness must stay local-first and send nothing out of the network.

    Published Aug 6, 2026self-described: Multi-agent coding harness, local-first

    Counts toward

    • Overall signal
    • Open Source & Self-Hosting: Positive
    • Open source decides the choice
    • Instrument with OpenTelemetry
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted

55. Negative

    Jordi Martinez, developer

    feat(observability): standardise on Phoenix; restore Langfuse v4 as fallbackGitHub pull request

    Made Phoenix their default and kept Langfuse v4 as a fallback. Tuned, Langfuse needed four containers and 1,848 MiB with ClickHouse, Redis, and S3, against one Phoenix container at about 400 MiB, and its v4 worker needed about four times v3's memory. Six setup problems broke along the way.

    "Started as "bring Langfuse back" (removed 2026-05-02, 4cfb295) and ended somewhere else. Both stacks are in the compose; Phoenix is the default everywhere, Langfuse is a tested fallback behind its profile."

    Published Aug 6, 2026self-described: Own infrastructure, run locally and on an AWS host

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • Upgrades & Migrations: Raised as a concern
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Measured

    Applies to

    Current

    Observed on

    Self-hosted Langfuse v4 against Phoenix 19.18.0

56. No opinion stated

    createsomethingtoday, CREATE SOMETHING repository owner (pull request author)

    Retire Braintrust for LangfuseGitHub pull request

    Replaced Braintrust with Langfuse across the monorepo's evals, telemetry, packages, scripts and CI workflows in July 2026, then reran nine eval suites against Langfuse. The pull request gives no reason for the move.

    Published Jul 6, 2026self-described: CREATE SOMETHING monorepo: evals, telemetry, prompts and MCP services

    Counts toward

    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

57. Positive

    Roger Viñas Alcon, Developer

    Strands Agents + Langfuse Evaluationsdev.to article

    Builds a Strands banking agent that Langfuse traces and evaluates continuously, running the evaluations in CI against a Langfuse started for the run.

    Published Jul 2, 2026self-described: Banking assistant agent trial

    Counts toward

    • Overall signal
    • Datasets & Evaluations: Positive

    Published on

    Engineering Blogs & Reviews

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    with Strands Agents

58. Positive

    spmurrayzzz, Hacker News commenter

    Comment on: AI OSS tool repo goes archived over night after raising $7.3M SeedHacker News comment

    Evaluated another open-source tracer, found its data model and UI cumbersome, and went with Langfuse over a tool they had built themselves, and still uses it.

    Published Jun 13, 2026self-described: Hacker News thread: AI OSS tool repo goes archived over night after raising US$7.3M Seed

    Counts toward

    • Overall signal
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

59. Positive

    marginTop15px, Reddit user, r/LLMDevs

    What I learned using Langfuse in a real AI recruiting agentReddit post

    Found Langfuse quick to pay off: traces let product and engineering read the same agent run, and prompt labels and config let the team switch models without a deploy. Mapping messy agent traces into dataset rows was the part the author had not worked out.

    Published Jun 3, 2026self-described: AI recruiting platform with a Clojure backend and a Python agent layer

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • Datasets & Evaluations: Mixed or negative
    • Prompt Management: Positive
    • Integrations & Setup: Positive
    • Prompts ship without deploys

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Langfuse Python SDK, prompt labels and prompt config, OpenRouter

60. Positive

    rafio77, Reddit user, r/LLMDevs

    I ran langfuse, langsmith and helicone in prod for a month and only one of them stuckReddit post

    Ran Helicone, LangSmith, and Langfuse in production for a month and kept Langfuse for being framework agnostic and self-hostable. Going from no observability to any of them mattered more than the gaps between them.

    Published May 20, 2026self-described: Production agents, three tools run side by side for a month

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • LLM apps need tracing
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

61. Mixed

    Vikram Singh, PyImageSearch author

    LLM Observability with Self-Hosted Langfuse and vLLMTutorial blog post, PyImageSearch

    Langfuse Cloud gave the author delayed trace delivery, out-of-order spans, and slow UI updates during development, so the series runs self-hosted Langfuse with a local vLLM server.

    Published May 18, 2026self-described: Tutorial series tracing a local vLLM app

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • SDK & UI Reliability: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Engineering Blogs & Reviews

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted, with vLLM

62. Positive

    Kim Jangwook, web developer (jangwook.net)

    Langfuse v3 Self-Hosting - Complete LLM Tracing GuidePersonal blog post, jangwook.net

    Moved to self-hosting once monthly traces passed 100,000 and Cloud Pro stopped feeling free. The v4 SDK broke about 50 imports. ClickHouse's 2 GB-plus memory use feels wasteful at his scale, though its query speed justifies the heavier stack.

    Published May 3, 2026self-described: Two personal and client projects, one on Langfuse Cloud and one self-hosted

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • Open Source & Self-Hosting: Positive
    • Self-Hosting Operations: Raised as a concern
    • Upgrades & Migrations: Raised as a concern
    • Unit Pricing & Cost: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Engineering Blogs & Reviews

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted v3, Python SDK 4.x

63. Negative

    JustZed32, Reddit user, r/LLMDevs

    Prototyping complex LLM agents? DO NOT use LangFuse or LiteLLM - use CLI coding agents or provider-native SDKs.Reddit post

    Advises against Langfuse and LiteLLM when prototyping agents: moving to CLI agents and provider SDKs cut their implementation work and removed a service, and the CLI shows model reasoning without opening Langfuse.

    Published Apr 13, 2026self-described: Coding agent for an enterprise workflow, prototyping stage

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

64. Negative

    alxdan, Reddit user, r/LocalLLaMA

    PSA: Check your Langfuse traces. Their SDK intercepts other tools' traces by default and charges you for them.Reddit post

    Found DeepEval spans in their Langfuse usage because the SDK attaches to the global OpenTelemetry provider and uploads any LLM span by default; a should_export_span filter limited it to Langfuse's own spans.

    Published Mar 12, 2026self-described: Langfuse v3.12 beside DeepEval in the same process

    Counts toward

    • Overall signal
    • SDK & UI Reliability: Raised as a concern
    • Unit Pricing & Cost: Raised as a concern

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Langfuse v3.12, Python SDK

65. Negative

    Michael Svendsen, developer

    Replace Langfuse with Phoenix, add LiteLLM proxy, add Snowflake Labs MCPGitHub pull request

    Replaced a self-hosted Langfuse stack and its ClickHouse, Redis, and MinIO services with a single Phoenix container on PostgreSQL.

    Published Mar 4, 2026self-described: Own self-hosted agent stack with LibreChat and LiteLLM

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Self-hosted Langfuse with ClickHouse, Redis, and MinIO

66. Positive

    KurSix, Hacker News commenter

    Comment on: Ask HN: What is the "Control Plane" for local AI agents?Hacker News comment

    Recommends self-hosted Langfuse for agent tracing, saying it covers about 90% of the pain points for teams without a control plane.

    Published Mar 4, 2026self-described: Hacker News thread: Ask HN: What is the "Control Plane" for local AI agents?

    Counts toward

    • Overall signal
    • Open Source & Self-Hosting: Positive
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

67. Mixed

    nzuchna, developer (issue author)

    bug: Filters for traces are not working like expectedGitHub issue

    Filtering traces by an LLM-as-a-judge score did not return the matching traces on self-hosted v3.150.0, so the author fell back to full-text search.

    Published Feb 4, 2026self-described: Self-hosted v3.150.0 with LLM-as-a-judge

    Counts toward

    • Overall signal
    • Datasets & Evaluations: Mixed or negative
    • SDK & UI Reliability: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted v3.150.0

68. Mixed

    ponywombat, Hacker News commenter

    Comment on: ClickHouse acquires LangfuseHacker News comment

    Recalls the move from v2 to v3, which added ClickHouse to self-hosted Langfuse, as a painful migration.

    Published Jan 17, 2026self-described: Hacker News thread: ClickHouse acquires Langfuse

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • Upgrades & Migrations: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted, v2 to v3

69. Mixed

    dandelionv1bes, Hacker News commenter

    Comment on: ClickHouse acquires LangfuseHacker News comment

    Sees value in a shared prompt repository, but struggled to implement Langfuse on the free plan because of bugs and confusing AI-driven docs, and was not impressed.

    Published Jan 17, 2026self-described: Evaluating for a wider recommendation

    Counts toward

    • Overall signal
    • Prompt Management: Positive
    • SDK & UI Reliability: Raised as a concern
    • Prompts ship without deploys

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    Hobby plan

70. Positive

    Roark66, Hacker News commenter

    Comment on: Cursor's latest "browser experiment" implied success without evidenceHacker News comment

    After Helicone's self-hosting docs fell short, chose LiteLLM with Langfuse for tracing coding-assistant traffic, with small code changes for pass-through.

    Published Jan 17, 2026self-described: Personal LLM proxy

    Counts toward

    • Overall signal
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

    Observed on

    self-hosted, with LiteLLM

71. Negative

    floriferous, Hacker News commenter

    Comment on: ClickHouse acquires LangfuseHacker News comment

    Migrated away from Langfuse to Sentry's LLM monitoring and found Langfuse's software not that good.

    Published Jan 17, 2026self-described: Hacker News thread: ClickHouse acquires Langfuse

    Counts toward

    • Overall signal
    • SDK & UI Reliability: Raised as a concern
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose another tool

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

72. Positive

    ossa-ma, Hacker News commenter

    Comment on: Langfuse Joins ClickHouseHacker News comment

    Rates Langfuse well above LangChain's tools on UI, developer experience, integrations, and docs, and expects little to change under ClickHouse.

    Published Jan 16, 2026self-described: Hacker News thread: Langfuse Joins ClickHouse

    Counts toward

    • Overall signal
    • Integrations & Setup: Positive

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Current

73. Positive

    walpurginacht, Hacker News commenter

    Comment on: Ask HN: What agent frameworks are you using, and how well do they work?Hacker News comment

    Enjoys LangGraph partly for its integration with Langfuse for observability.

    Published Dec 17, 2025self-described: Hacker News thread: Ask HN: What agent frameworks are you using, and how well do they work?

    Counts toward

    • Overall signal
    • Integrations & Setup: Positive

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    with LangGraph

74. Negative

    Past-Today-2642, Reddit user, r/LLMDevs

    Any langfuse user that could help meReddit post

    An LLM-as-a-judge evaluator set up on existing traces stayed active and never ran an evaluation.

    Published Dec 17, 2025self-described: LLM-as-a-judge evaluator on existing traces

    Counts toward

    • Overall signal
    • Datasets & Evaluations: Mixed or negative
    • SDK & UI Reliability: Raised as a concern

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

75. Mixed

    abhidadhaniya23, developer (issue author)

    bug: Experiments and Evaluators fail to parse Anthropic "thinking" block from reasoning modelsGitHub issue

    With extended thinking on, Langfuse experiments and evaluators could not parse Anthropic responses, which made them unusable for that model setup.

    Published Dec 13, 2025self-described: Experiments with Anthropic models

    Counts toward

    • Overall signal
    • Datasets & Evaluations: Mixed or negative
    • SDK & UI Reliability: Raised as a concern

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    Experiments and LLM-as-a-judge

76. Negative

    Repulsive-Memory-298, Reddit user, r/LLMDevs

    Langfuse multi-step traces?Reddit post

    Could not turn a whole multi-step agent trace into a dataset item from the UI, only the top-level input and output or single steps, and questioned the point of datasets without it.

    Published Nov 20, 2025self-described: Agent with multi-step traces grouped by trace ID

    Counts toward

    • Overall signal
    • Datasets & Evaluations: Mixed or negative
    • Feature Gaps: Raised as a concern

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

77. Mixed

    mnze_brngo_7325, Reddit user, r/LLMDevs

    Langfuse vs. MLflowReddit post

    Moved from MLflow to Langfuse because its traces of agents calling other agents were easier to read, but was reconsidering MLflow for evals and experiments.

    Published Nov 13, 2025self-described: pydantic-ai agents, self-hosted open-source tools only

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

78. Mixed

    corrylc, developer (issue author)

    bug: Incompatibility with Python 3.14GitHub issue

    The Python SDK failed to import on Python 3.14 on its release day because it relied on Pydantic v1; the issue drew 49 upvotes.

    Published Oct 8, 2025self-described: GitHub repository langfuse/langfuse

    Counts toward

    • Overall signal
    • SDK & UI Reliability: Raised as a concern

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    Python SDK

79. Positive

    7thpower, Hacker News commenter

    Comment on: LLM Observability in the Wild, Why OpenTelemetry Should Be the StandardHacker News comment

    Prefers Langfuse to Phoenix: its Python decorator works out of the box where Phoenix instrumentation was a struggle, and prompt management sits under the same roof.

    Published Sep 30, 2025self-described: Hacker News thread: LLM Observability in the Wild, Why OpenTelemetry Should Be the Standard

    Counts toward

    • Overall signal
    • Prompt Management: Positive
    • Integrations & Setup: Positive
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

80. Positive

    Margarita Sliachina, Data scientist

    LLM Observability: Debugging My Journaling Agentdev.to article

    Picked Langfuse, added the observe decorator after a quick install, and used its traces to find why their journaling agent kept looping when prompt and model changes had not helped.

    Published Sep 20, 2025self-described: AI journaling assistant side project

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • Integrations & Setup: Positive

    Published on

    Engineering Blogs & Reviews

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

81. Positive

    bluecoconut, Hacker News commenter

    Comment on: Building your own CLI coding agent with Pydantic-AIHacker News comment

    Switched their agents to Pydantic AI and especially likes pairing it with Langfuse.

    Published Aug 28, 2025self-described: Hacker News thread: Building your own CLI coding agent with Pydantic-AI

    Counts toward

    • Overall signal
    • Integrations & Setup: Positive

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    with Pydantic AI

82. Positive

    screye, Hacker News commenter

    Comment on: It is worth it to buy the fast CPUHacker News comment

    Runs Langfuse locally to monitor hundreds of LLM calls from local agents, part of a workload whose memory needs push them to a 64 GB machine.

    Published Aug 24, 2025self-described: Local agent development

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Positive
    • Self-Hosting Operations: Discussed without concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    self-hosted

83. Positive

    NeutralCrane, Hacker News commenter

    Comment on: Open SWE by LangChainHacker News comment

    Calls Langfuse the best tool the commenter has tried: open source, focused at the right level of abstraction, reliable where LangChain products broke, and cheaper than LangSmith's seat and per-trace billing.

    Published Aug 11, 2025self-described: Hacker News thread: Open SWE by LangChain

    Counts toward, pending a recheck

    • Overall signal
    • Integrations & Setup: Positive
    • Unit Pricing & Cost: Discussed without concern
    • Open source decides the choice
    • When practitioners weigh Langfuse against another platform, which do they keep?: Chose or kept Langfuse

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Needs a recheck

84. Mixed

    willriley, developer (issue author)

    bug(python-sdk): Using @observe with FastAPI StreamingResponse breaks everything up into separate traces.GitHub issue

    With the Python SDK v3, the observe decorator splits a FastAPI streaming endpoint into separate traces, a problem reported fixed earlier that persisted.

    Published Jul 30, 2025self-described: Self-hosted, FastAPI app

    Counts toward

    • Overall signal
    • Trace-Level Debugging: Mixed or negative
    • SDK & UI Reliability: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    Python SDK v3, self-hosted

85. Mixed

    nomo-fomo, Reddit user, r/LangChain

    Langfuse Data retention: self HostedReddit post

    Asked how to delete traces after a set number of days or move them to cloud storage on the self-hosted community edition, which has no built-in retention policies.

    Published Jul 28, 2025self-described: Self-hosted Langfuse community edition

    Counts toward

    • Overall signal
    • Feature Gaps: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    Self-hosted Langfuse, community edition

86. Mixed

    harrygao56, developer (issue author)

    Add support for conditional rendering in prompt managementGitHub issue

    Prompt composability lacks conditional sections, so the author either sends both instruction sets to the model or keeps instructions in code.

    Published May 19, 2025self-described: Prompts with conditional instructions

    Counts toward

    • Overall signal
    • Prompt Management: Mixed or negative
    • Feature Gaps: Raised as a concern

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    Prompt management

87. Positive

    simple10, Hacker News commenter

    Comment on: Gemini 2.5 Pro PreviewHacker News comment

    Runs LiteLLM locally with Langfuse to view traces of coding-assistant calls, spun up together from a local stack.

    Published May 6, 2025self-described: Local LLM proxy for coding tools

    Counts toward

    • Overall signal
    • Integrations & Setup: Positive
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    self-hosted, with LiteLLM

88. Mixed

    tubone24, developer (issue author)

    bug: Clickhouse Migration Failure After Version v3.28.2GitHub issue

    A self-hosted upgrade past v3.28.2 failed while applying ClickHouse migrations, blocking the version upgrade.

    Published Feb 16, 2025self-described: Self-hosted upgrade

    Counts toward

    • Overall signal
    • Self-Hosting Operations: Raised as a concern
    • Upgrades & Migrations: Raised as a concern
    • Do practitioners run Langfuse themselves or use Langfuse Cloud?: Self-host it

    Published on

    Developer Communities

    Who

    Individual builder

    Evidence

    Reported

    Applies to

    Still applicable

    Observed on

    self-hosted v3