LangSmith

LangSmith

FreemiumFree plan available
Full trace capture for all LLM callsRegression testing workflowsProduction performance monitoringHuman evaluation tools+1 more
Pricing
Freemium
Free plan available
Features
5 listed
Key capabilities
Use Cases
4 listed
Identified use cases
Access
Web App
Browser-based
Listed on Nextool since Feb 2026

About LangSmith

"Production observability platform for debugging and monitoring LLM applications"

LangSmith is LangChain's production monitoring, testing, and debugging platform for LLM applications, providing the observability layer that AI teams need to build reliable AI products. It captures every LLM call, agent action, and chain execution with full context, enabling developers to trace failures, compare model outputs, run regression tests, and monitor production performance in real-time. LangSmith integrates seamlessly with LangChain and LangGraph but also works with any LLM framework, making it the standard choice for teams that need confidence in their AI application quality.

Key Features

5
Full trace capture for all LLM calls
Regression testing workflows
Production performance monitoring
Human evaluation tools
LangChain native integration

Best For

4 use cases
Debugging LLM application failures
Production AI monitoring
LLM regression testing
Team collaboration on AI quality
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Official Links

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Tool Details

Pricing
Freemium
Platform
Web
Best For
Debugging LLM application failures
Features
5 listed
Categories
2
Listed
Feb 2026
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