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LangSmith

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Tracing, evals, and prompt management from the LangChain team.

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LangSmith is a managed platform for tracing, evaluating, and monitoring LLM apps, with a prompt hub and dataset tooling. It works with or without LangChain and offers enterprise self-hosting.

License
Proprietary
Deployment
Managed, Hybrid
Pricing
Free developer tier; usage-based and enterprise plans.
SDKs / languages
Python, TypeScript
Founded
2023

Strengths

  • Deep tracing + evals in one place
  • Prompt hub and datasets
  • Framework-agnostic

Limitations

  • Core platform is proprietary
  • Self-hosting is enterprise-only

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Prompt Engineering & Management

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Facts verified 19 July 2026. Neutral summary, not an endorsement; verify current details with the vendor.