LangGraph
Build stateful, multi-step AI agent workflows with LangChain's powerful graph-based framework.
About LangGraph
LangGraph is an open-source library built on LangChain for creating stateful, multi-actor AI applications. It models agent workflows as graphs where nodes represent computation steps and edges define transitions. This makes it ideal for complex agentic workflows with loops, conditionals, human-in-the-loop checkpoints, and persistent state. LangGraph powers many production AI agent deployments.
Use Cases
Build complex multi-step AI pipelines with cycles
Implement human-in-the-loop approval workflows
Create persistent agent state across conversations
Develop customer service routing systems
Build research and retrieval-augmented agents
Key Features
Pricing
Open source library is free. LangSmith Cloud for observability has paid tiers.