What is changing across AI Observability?
Langfuse wins teams on open source, self-hosting and integrations, and loses some to the work of running ClickHouse. Public accounts show what traces and prompt management delivered, what upgrades cost, and why some teams moved to another tool.
Also covers LangSmith and Arize
For 200,000 traces a month and 10 users, GILD calculates US$199 to US$369 on Langfuse and US$1,340 on LangSmith Plus; Arize AX Pro came to US$1,610 at the US$0.0008 per-span overage Arize listed on Oct 25, 2026, a rate its pricing page no longer shows. Each tool meters a different unit, so price your own trace shape and retention before comparing plans.
Also covers LangSmith and Arize
