What LangSmith does
LangSmith is an LLM application observability and evaluation platform. It traces applications built with any LLM framework, including via OpenTelemetry, and provides dashboards and alerting to monitor production performance.
Why teams reach for it: Automatically clusters traces into recurring failure modes, and works with any LLM framework, not only LangChain.
How LangSmith compares
Fields the vendor doesn't document are left blank here rather than guessed — a blank means nothing verified, not a "no."
- Perspective
- Agent developer
- Mcp Aware
- Both
- Instrumentation Method
- server SDK, OpenTelemetry
- Traces
- Yes
- Session Replay
- Yes
- Evaluations
- Yes
- Datasets
- Yes
- Self Hostable
- Enterprise plan only
How will you trace quality and operations?
Observability & evaluation tools track how well an MCP server is performing and help catch issues once it's live.