About LangSmith
LangChain's tracing and monitoring platform for agents and LLM apps.
Observability & Evals
Alternatives to LangSmith
4 observability & evals tools you can use instead of LangSmith, 2 of them open source. Summaries come from each vendor's own site. Links checked Oct 16, 2026.
At a glance
LangSmith alternatives compared
| Tool | What it does | Open source | Head to head |
|---|---|---|---|
| AgentOps | Tracing and debugging for AI agents. | No | LangSmith vs AgentOps |
| Braintrust | Observability and evals platform for production agents. | No | LangSmith vs Braintrust |
| Helicone | AI gateway with routing and LLM observability. | Yes | LangSmith vs Helicone |
| Langfuse | Open-source tracing, evals, and observability for agents. | Yes | LangSmith vs Langfuse |
Observability & Evals
All 4 alternatives
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AgentOps
agentops.aiTracing and debugging for AI agents.
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Braintrust
braintrust.devObservability and evals platform for production agents.
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Helicone
helicone.aiAI gateway with routing and LLM observability.
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Langfuse
langfuse.comOpen-source tracing, evals, and observability for agents.
FAQ
Questions
What are the alternatives to LangSmith?
Agent Stack Directory lists 4 other observability & evals tools: AgentOps, Braintrust, Helicone, Langfuse.
Is there an open-source alternative to LangSmith?
Yes. Among the alternatives we list, these are marked open source: Helicone, Langfuse.
What does LangSmith do?
LangChain's tracing and monitoring platform for agents and LLM apps. (Summary based on langchain.com, link checked 2026-10-16.)