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LangChain

Creator of LangChain framework and LangSmith observability platform. Open-source tools for building LLM applications with agent memory, chains, and tool use. LangSmith provides debugging, testing, and monitoring for production AI systems.

Founded 2022

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AI Platforms

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Tools from LangChain

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LangChain

Vector Databases & Memory

Open-source framework for building LLM applications with memory management, conversation buffers, and retrieval chains. Integrates with every major vector database and LLM provider. Includes LangSmith for debugging and monitoring agent memory.

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LangSmith

AI Platforms

LLM observability and evaluation platform from LangChain. Debug, test, and monitor AI agents and chains. Trace every step of agent execution, evaluate outputs with custom criteria, and track performance over time. Essential for production AI applications.