We help developers make the impossible, possible.

LangChain is the platform developers and enterprises choose
to build AI apps from prototype to production.


We're on a mission to make it easy to build the LLM apps of tomorrow, today. We build products that enable developers to go from an idea to working code in an afternoon and in the hands of users in days or weeks. We’re humbled to support 100k+ companies who choose to build with LangChain. And we built LangSmith to support all stages of the AI engineering lifecycle, to get applications into production faster.

Our small but mighty team based in San Francisco.

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The biggest developer community in  GenAI

Learn alongside the 100K+ practitioners 
who are pushing the industry forward.

Explore LangChain

Come join us

We’re hiring across many teams. Explore our open positions or read more about Careers at LangChain.

Ready to start shipping 
reliable GenAI apps faster?

Get started with LangChain, LangGraph, and LangSmith to enhance your LLM app development, from prototype to production.