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 19.4k

  2. langgraph langgraph Public

    Build resilient language agents as graphs.

    Python 20.1k 3.5k

  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 8.2k 852

  6. opengpts opengpts Public

    Rich Text Format 6.7k 911

Repositories

Showing 10 of 224 repositories
  • langgraph Public

    Build resilient language agents as graphs.

    langchain-ai/langgraph’s past year of commit activity
    Python 20,086 MIT 3,529 135 (13 issues need help) 36 Updated Oct 22, 2025
  • langchain-ibm Public
    langchain-ai/langchain-ibm’s past year of commit activity
    Python 22 MIT 20 8 3 Updated Oct 22, 2025
  • deepagents Public
    langchain-ai/deepagents’s past year of commit activity
    Python 4,490 MIT 654 17 18 Updated Oct 22, 2025
  • langchain-aws Public

    Build LangChain Applications on AWS

    langchain-ai/langchain-aws’s past year of commit activity
    Python 226 MIT 210 66 (1 issue needs help) 29 Updated Oct 22, 2025
  • helm Public

    Repository hosting Langchain helm charts.

    langchain-ai/helm’s past year of commit activity
    Shell 68 Apache-2.0 28 2 1 Updated Oct 22, 2025
  • langchainjs Public

    🦜🔗 Build context-aware reasoning applications 🦜🔗

    langchain-ai/langchainjs’s past year of commit activity
    TypeScript 16,082 MIT 2,824 129 (6 issues need help) 66 Updated Oct 22, 2025
  • langgraphjs Public

    Framework to build resilient language agents as graphs.

    langchain-ai/langgraphjs’s past year of commit activity
    TypeScript 2,190 MIT 333 57 20 Updated Oct 22, 2025
  • lca-langgraph-essentials Public
    langchain-ai/lca-langgraph-essentials’s past year of commit activity
    Jupyter Notebook 0 2 0 1 Updated Oct 22, 2025
  • langgraph-101 Public

    Learn about the fundamentals of LangGraph through a series of notebooks

    langchain-ai/langgraph-101’s past year of commit activity
    Jupyter Notebook 216 MIT 44 0 0 Updated Oct 21, 2025
  • langchain-azure Public

    Build secure LangChain applications on Azure

    langchain-ai/langchain-azure’s past year of commit activity
    Python 96 MIT 39 10 4 Updated Oct 21, 2025
View all repositories