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LangChain

Open-source framework for building LLM apps, with the LangSmith platform for monitoring and deployment.

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What it is

LangChain is an open-source framework for building applications and agents on top of language models. The company also sells LangSmith, a platform for observability, evaluation and deployment of agents. LangSmith has a free Developer plan, a Plus plan at $39 per seat per month, and custom Enterprise pricing with self-hosting options.

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