Reviewed by the Softwares.com Editorial Team · Last updated June 2026 · How we rate
Key facts
- Vendor
- LangChain
- Pricing
- Freemium — Free – $39/user/mo
- Free tier
- Yes
- Platforms
- Web, Api
- Best for
- Ai Developers
- Editor rating
- 4.4 / 5
- Founded
- 2023
- Headquarters
- San Francisco, CA, USA
What is LangSmith?
LangSmith is a ai machine learning tool from LangChain. LangSmith provides tracing, evaluation, and monitoring for LLM and agent applications.
LangSmith uses freemium pricing and offers a free tier you can start on without a credit card. Free – $39/user/mo.
It's best suited to ai-developers and runs on Web, Api.
Standout strengths include llm tracing & evals, works beyond langchain, free tier. Worth weighing: most useful with langchain.
LangSmith pricing
Pros
- LLM tracing & evals
- Works beyond LangChain
- Free tier
Cons
- Most useful with LangChain
LangSmith vs alternatives
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Frequently asked questions
What is LangSmith?
LangSmith provides tracing, evaluation, and monitoring for LLM and agent applications.
How much does LangSmith cost?
LangSmith is freemium-priced. It has a free tier. Paid plans start at $39/user/mo.
Does LangSmith have a free trial?
LangSmith offers a free tier rather than a time-limited trial.
What platforms does LangSmith support?
LangSmith is available on Web, Api.