Build context-aware, reasoning applications with LangChain’s flexible abstractions and AI-first toolkits.
Core OSS libraries:
LangChainandLangChain.js- reusable components and integrations for building LLM applicationsLangGraphandLangGraph.js- build LLM agents as graphs
Products:
LangSmith- platform for building and monitoring production-grade LLM applicationsLangGraph Platform- infrastructure for deploying LangGraph agents
OSS extensions and apps:
ChatLangChainandChatLangChain.js- chatbot for answering questions about LangChain's open source librariesOpen 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 applicationSocial 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
- Company website
- LangChain Academy: Comprehensive, free courses on LangChain libraries and products, made by the LangChain team
- LangChain docs: Python and TypeScript
- LangGraph docs: Python and TypeScript
- LangSmith docs