About LangChain
LangChain is the worlds most popular framework for building LLM-powered applications, founded in 2022 and headquartered in San Francisco, California. Founded by Harrison Chase and Ankush Gola, LangChain provides the open-source LangChain framework with Python and JavaScript libraries, the LangGraph orchestration framework for stateful AI agents, LangSmith for observability and evaluation, and LangServe for deployment. The platform supports integrations with all major LLMs including OpenAI, Anthropic, Google, Cohere, and open-source models, plus hundreds of vector databases, document loaders, and tools. LangChain has over 100,000 GitHub stars, is used by companies including Klarna, Replit, Rakuten, Elastic, and Morningstar, and raised 25 million Series A at a 200 million valuation.