Automation & Workflow Orchestration
LangSmith
Production observability, tracing, and evaluation suite for LLM agent workflows
Freemium - from FreeRuns in the cloud
Pricing
Freemium - from Free
Free
Platforms
Web
Hosted app
Category
Automation & Workflow Orchestration
83 tools
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Last updated
Nov 4
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Multi-step agent execution tracing
Visualize recursive agent reasoning loops, tool calls, and error recoveries with detailed flamegraphs.
Pricing checked Nov 2026
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About LangSmith
LangSmith by LangChain is a purpose-built observability and evaluation platform for AI agents and LLM applications. It provides deep visibility into complex agent reasoning chains, tool invocations, and prompt histories, helping developers debug edge cases and ship reliable AI products.
- Deep native integration with LangChain, LangGraph, and independent Python/TypeScript frameworks
- Detailed visual trace inspection of complex agentic execution trees
- Integrated prompt playground with test dataset evaluation loops
- Trace step volumes can grow rapidly in high-throughput customer-facing applications
- Best developer experience is achieved when aligned with LangChain idioms
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