Core OSS libraries:
LangChainandLangChain.js– reusable components and integrations for building LLM applicationsLangGraphandLangGraph.js– build LLM agents as graphsDeep AgentsandDeep Agents.js– agents that can plan, use subagents, and leverage file systems for complex tasks
Commercial Platform:
LangSmith– platform for building and monitoring production-grade LLM applications
OSS extensions and apps:
Deep Agents Code-dcodeis an open source coding agent in your terminal, similar to Claude Code or Cursor, powered by any LLMOpen SWE– open source asynchronous coding agentMCP Adapters– make MCP tools compatible with LangChain and LangGraphAgent Protocol– our attempt at codifying the framework-agnostic APIs that are needed to serve LLM agents in productionOpenWiki- CLI agent for codebase and personal memory wiki generation & maintenance.
- Documentation – unified docs for LangChain projects and services (source)
- Community forum – discuss, get help, and talk shop
- LangChain Academy – comprehensive, free courses on LangChain libraries and products, made by the LangChain team