LangSmith: Agent observability, evaluation, and deployment

Anyone can build an agent. But is yours actually working? LangSmith is the agent engineering platform built for observability, evaluation, and everything in between — so you can stop guessing and start shipping better agents. Whether you're building on LangGraph, OpenAI SDK, Anthropic SDK, CrewAI, or anything else — LangSmith connects via OpenTelemetry. No stack changes required. Free to get started → https://smith.langchain.com Learn more about our products → https://langchain.com