Comparisons

Handshake built both into one internal LLM service. Pick Datadog Agent Observability when your operators already live in Datadog and want agent traces beside APM, billed per LLM span. Pick Arize when AI engineers need their own evaluation workspace or Phoenix to self-host.

Pick Datadog Agent Observability to watch agents beside APM, infrastructure, and user sessions; it prices LLM spans and keeps traces 15 days by default. Pick Braintrust when evals gate releases; it prices gigabytes and scores and builds around datasets, experiments, and scorers.