LangGraph — Agent Frameworks Platform

LangGraph is LangChain's graph-based orchestration framework for building stateful, multi-step AI agents, released as part of the LangChain ecosystem in 2023. It models agent workflows as directed acyclic graphs (DAGs) with nodes and edges, enabling complex control flow patterns like branching, looping, and human-in-the-loop interactions. LangGraph supports persistent state across interactions, streaming responses, and deployment through LangGraph Cloud. The framework is MIT-licensed and free to use for self-hosted deployments, with paid cloud hosting options through LangGraph Platform. While LangChain provides simple linear chains, LangGraph enables sophisticated multi-agent systems with explicit control flow, making it ideal for building production-grade agents that require complex decision-making logic. The framework has been adopted by enterprises including Klarna, LinkedIn, Replit, and GitLab as part of the broader LangChain platform, which raised $125M at a $1.25B valuation in October 2025.