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LangSmith

Debug, test, and monitor LLM applications.

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What we love

  • Tight LangChain integration
  • Strong tracing + debugging
  • Active community

What to watch

  • Best within the LangChain ecosystem
  • Setup learning curve

Best for

LangChain-based teams debugging + evaluating LLM apps.

Key features

  • Tracing (built on OpenTelemetry)
  • Evaluations + datasets
  • Prompt hub + playground
  • LangChain native
  • Multi-language SDKs

What is LangSmith?

LangSmith by LangChain provides tracing, evaluation, and observability for LLM apps. The most popular choice for teams building with LangChain.

Who is it for?

LangSmith is a great fit for teams looking for a ai & machine learning tool that fits the freemium tier. It's especially loved by AI engineers, product teams, and founders shipping AI features.

Key tags

LLM OpsObservabilityEvaluation

How it compares

We curate LangSmith among the top AI & Machine Learning tools on saas.fyi. Browse all AI & Machine Learning tools to compare alternatives, or use the directory's search and filters to find a closer fit.

Pricing

Free, Plus $39/user/mo. Pricing tier: Freemium. Always confirm current pricing on the official site — SaaS pricing changes frequently.

Quick facts

  • Category: AI & Machine Learning
  • Pricing: Freemium — Free, Plus $39/user/mo
  • Website: langchain.com
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