LangSmith platform to trace, evaluate and deploy AI agents; framework-agnostic tooling for AI engineering teams.
What it does
LangChain offers LangSmith, an agent-engineering platform to observe, evaluate and deploy AI agents. It is framework-agnostic with Python, TypeScript, Go and Java SDKs, and pairs with its open-source frameworks (langchain, langgraph, deepagents).
Core features
Agent observability and tracing
Evaluation and scoring
Agent deployment and scaling
Framework-agnostic SDKs
Open-source frameworks (langgraph, langchain)
Best for
→Debug and monitor LLM agents in production
→Evaluate and improve agent quality
→Deploy and scale agents
Pricing
Developer
$0/seat
Plus
$39/seat
Toolspool rankingby global site rank
Reviews
Big-picture takes: what it's for and whether it delivers. High-engagement YouTube videos — not sponsored.
Tutorials
Step-by-step: exactly how to get things done with it.