What are the best alternatives to LangSmith?

The top alternatives to LangSmith are PostHog, Hugging Face MCP Server, SafetyBench Eval, ranked by real usage data on Unfragile.

Are there free alternatives to LangSmith?

Yes, 20 free alternatives to LangSmith exist, including PostHog, Hugging Face MCP Server, SafetyBench Eval.

20 alternatives ranked by real usage data. LangSmith scores 60/100 — 17 tools score higher.

LangChain's LLMOps platform — tracing, evaluation, prompt hub, dataset management, annotation.

20 alternatives

20 free options

17 score higher

Open-source product analytics with LLM observability — traces, costs, evals unified with product metrics.