Agent Eval & LLM Observability

The AI engineering platform for self-improving agents. Observe. Evaluate. Learn.

Surface patterns in production, turn them into evals, and improve quality with every release.

Trace, evaluate, and improve AI agents with one open platform. Use production data to understand behavior, collaborate on fixes, and ship better quality at lower cost and latency.

LangSmith Observability gives you complete visibility into agent behavior.

Connect AI spend, engineering output, quality, and governance to understand where AI creates value — and where it does not.