
Agent engineering platform
langchain.com (opens in a new tab)LangChain builds the foundation developers use to take AI agents from prototype to production. The gap it addresses is the one between an agent that demonstrates well and an agent a team can depend on, which takes evaluation, deployment and operational tooling rather than better prompting. The company started as widely adopted open-source libraries and has grown into a platform for building, evaluating, deploying and operating agents at scale, while keeping the open-source work that brought those developers in the first place.