LangChain builds the tooling that developers use to construct AI agents - from early prototyping through to production deployment. Its open-source frameworks, LangChain and LangGraph, together attract over 90 million downloads per month and connect with more than 1,000 integrations, covering the range of models, data sources, and external services that agent applications typically require.
Alongside its open-source work, LangChain offers LangSmith, a commercial platform designed for teams taking agents into production. LangSmith provides observability, evaluation, and deployment capabilities for large language model (LLM) systems - addressing the reliability and monitoring challenges that arise once agents move beyond development.
The company's customers span both large enterprises and early-stage startups. AI teams at organisations including LinkedIn, Workday, Coinbase, Cloudflare, Rippling, Vanta, Replit, Clay, and Harvey rely on LangChain's stack. The broader developer base runs to millions of users worldwide.
