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LangSmith is LangChain's platform for debugging, testing, evaluating, and monitoring LLM applications and agent workflows.
Pricing
From $39 / seat / mo
Founded
Not listed
Team size
Not listed
Headquarters
Not listed
Preview from langchain.com/langsmith
At a glance
Best for
AI/ML Engineer
Pricing model
Tiered plans
Try before you buy
Free trial · Free plan
Integrates with
OpenAI SDKAnthropic SDKVercel AI SDKLlamaIndexLangChain+4
About LangSmith
LangSmith is designed for teams building with LLMs and agents that need to move beyond ad hoc prompt testing. It brings together traces, datasets, experiments, evaluations, and production monitoring so teams can improve reliability before and after launch.
It is especially useful when prompt quality, tool-calling behavior, and agent outcomes need to be measured across iterations instead of treated as a black box.
Procurement & Fit
Structured facts from the vendor to help your security, finance, and procurement reviews move faster.
Pricing
Commercial model
Pricing model: Tiered plans
Free trial: Yes
Free plan: Yes
Contract minimum: Not specified
Procurement
Purchasing & legal
The vendor hasn’t added purchasing & legal details yet.
Fit
Best-fit company size
Company-size fit has not been specified yet.
Buyer Fit & Positioning
Implementation & Procurement
Commercial Fit & Ecosystem
Proof, Outcomes & Momentum
Alternatives, Migration & Buyer Objections
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LangSmith
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