Builders
LangChain is an open-source platform that enables the development of agentic systems through a declarative language, allowing users to define chains of actions and deploy them as production-ready APIs. The platform has expanded its capabilities with the introduction of LangServe for hosting LCEL code and LangSmith for observability and evaluation. Additionally, LangChain offers managed infrastructure for deploying long-running, stateful AI agents through its LangGraph Platform.