Skip to content
@langchain-ai

LangChain

README.md

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

Core OSS libraries:

Commercial Platform:

  • LangSmith - platform for building and monitoring production-grade LLM applications

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 - our attempt at codifying the framework-agnostic APIs that are needed to serve LLM agents in production

Learn more

Popular repositories Loading

  1. langchain langchain Public

    🦜🔗 Build context-aware reasoning applications

    Python 118k 19.5k

  2. langgraph langgraph Public

    Build resilient language agents as graphs.

    Python 20.3k 3.6k

  3. langchainjs langchainjs Public

    🦜🔗 Build context-aware reasoning applications 🦜🔗

    TypeScript 16.1k 2.8k

  4. open_deep_research open_deep_research Public

    Python 9.3k 1.3k

  5. local-deep-researcher local-deep-researcher Public

    Fully local web research and report writing assistant

    Python 8.3k 862

  6. opengpts opengpts Public

    Rich Text Format 6.7k 913

Repositories

Showing 10 of 224 repositories
  • context_engineering Public
    langchain-ai/context_engineering’s past year of commit activity
    Jupyter Notebook 111 30 1 1 Updated Oct 28, 2025
  • langchain-datastax Public

    DataStax Astra DB integration with LangChain

    langchain-ai/langchain-datastax’s past year of commit activity
    Python 33 MIT 12 13 0 Updated Oct 28, 2025
  • langchain-neo4j Public
    langchain-ai/langchain-neo4j’s past year of commit activity
    Python 22 MIT 17 4 1 Updated Oct 28, 2025
  • langchain-snowflake Public
    langchain-ai/langchain-snowflake’s past year of commit activity
    Python 12 MIT 11 3 1 Updated Oct 28, 2025
  • deepagents Public
    langchain-ai/deepagents’s past year of commit activity
    Python 4,703 MIT 693 22 27 Updated Oct 27, 2025
  • docs Public

    🦜🔗 Docs for LangChain projects

    langchain-ai/docs’s past year of commit activity
    MDX 53 MIT 359 71 40 Updated Oct 28, 2025
  • deepagentsjs Public

    Deep Agents in JS

    langchain-ai/deepagentsjs’s past year of commit activity
    TypeScript 195 MIT 29 6 4 Updated Oct 28, 2025
  • langgraphjs Public

    Framework to build resilient language agents as graphs.

    langchain-ai/langgraphjs’s past year of commit activity
    TypeScript 2,215 MIT 335 59 23 Updated Oct 28, 2025
  • langgraph Public

    Build resilient language agents as graphs.

    langchain-ai/langgraph’s past year of commit activity
    Python 20,318 MIT 3,582 149 (13 issues need help) 44 Updated Oct 28, 2025
  • langsmith-mcp-server Public
    langchain-ai/langsmith-mcp-server’s past year of commit activity
    Python 42 MIT 15 4 4 Updated Oct 27, 2025
View all repositories