langchain-ai/langchain
★ 147,434 stars
Covered in week 2026-W11 · the 2026-03 report
The agent engineering platform.
What langchain is
LangChain is a framework for building agents and LLM-powered applications. It helps you chain together interoperable components and third-party integrations to simplify AI application development — all while future-proofing decisions as the underlying technology evolves.
From the repository README · read it on GitHub →
Transcript
What do 128,000 developers know that you don't? LangChain is the agent engineering platform trusted by LinkedIn, Uber, and Klarna. It lets you swap between OpenAI, Anthropic, and Gemini models without rewriting a single line of code. With hundreds of integrations for vector stores, tools, and data sources, you can build production-ready AI applications in days, not months. Its modular architecture means rapid prototyping without technical debt. Star the repo and start building at github.com/langchain-ai/langchain