LangGraph

LangGraph is an MIT-licensed agent orchestration framework that provides granular, low-level primitives for designing fully customizable agent architectures including single-agent, multi-agent, and hierarchical control flows. It features built-in persistent memory stores that maintain conversation histories across sessions. The framework supports native token-by-token streaming, human-in-the-loop interrupt and approval workflows, and avoids black-box abstractions, letting teams build solutions tailored to their specific requirements. Production adoption includes Klarna, Lyft, LinkedIn, and Cloudflare.