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Build context-aware, reasoning applications with LangChain’s flexible abstractions and AI-first toolkits.

Core OSS libraries:

Products:

  • LangSmith - platform for building and monitoring production-grade LLM applications
  • LangGraph Platform - infrastructure for deploying LangGraph agents

OSS extensions and apps:

  • ChatLangChain and ChatLangChain.js - chatbot for answering questions about LangChain's open source libraries
  • Open Canvas - document & chat-based UX for writing code or markdown. Inspired by OpenAI's Canvas (TypeScript)
  • OpenGPTs - open source version of OpenAI's GPTs API (Python)
  • Email assistant - AI assistant that helps you maintain your emails (Python)
  • LangChain + Next.js template - template LangChain.js + Next.js application
  • Social media agent - agent for sourcing, curating, and scheduling social media posts with human-in-the-loop (TypeScript)
  • Agent Protocol - Agent Protocol is our attempt at codifying the framework-agnostic APIs that are needed to serve LLM agents in production

Learn more

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Repositories

Showing 10 of 157 repositories
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    Python 9,682 MIT 1,598 63 47 Updated Mar 4, 2025
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    langchain-ai/langchain’s past year of commit activity
    Jupyter Notebook 102,235 MIT 16,570 331 (5 issues need help) 59 Updated Mar 4, 2025
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    langchain-ai/langgraphjs’s past year of commit activity
    TypeScript 1,078 MIT 157 80 19 Updated Mar 4, 2025
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    langchain-ai/langgraph-bigtool’s past year of commit activity
    Python 21 MIT 2 0 0 Updated Mar 4, 2025
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    langchain-ai/langchain-aws’s past year of commit activity
    Python 133 MIT 133 61 (1 issue needs help) 29 Updated Mar 4, 2025
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    Python 427 MIT 43 2 0 Updated Mar 4, 2025
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    langchain-ai/social-media-agent’s past year of commit activity
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