LangChain is a platform focused on agent engineering, offering both open source frameworks and a commercial product for building, testing, and deploying AI agents. Its core technical domains include LLM systems, observability, evaluation, and deployment. The company's open source offerings, LangChain and LangGraph, are frameworks for constructing AI agents, with the former providing pre-built architectures and integrations and the latter offering more granular control. These frameworks report over 90 million downloads per month and support more than 1,000 integrations.
The commercial platform, LangSmith, provides tools for observability, evaluation, and deployment of LLM systems. LangChain operates within the AI development and enterprise software sectors, serving both startups and larger organizations. The company states its frameworks are trusted by millions of developers worldwide.
