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AI Agent Builders
AI Agents
Agentic AI
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LangChain Costs

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Open-source framework for Python and JavaScript for building AI agents from language models, tools and middleware.

LangChain Pricing

Last edited: October 2026
  • LangChain
    Free
    Free and open source under the MIT license, there is no paid version of the framework.
    Open source under the MIT license
    Libraries for Python and JavaScript
    create_agent agent loop on the LangGraph runtime
    Middleware for human-in-the-loop approval, compression of long conversations and removal of sensitive data
    More than 1,000 integrations for models, tools and databases
    Free introductory course in LangChain Academy
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LangChain is free and open source under the MIT license, costs for connected language models are billed by the respective model providers. LangSmith, the provider's paid platform for tracing, evaluation and deployment, is billed separately. The provider's information prevails.

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