Open-source project

LangGraph

langchain-ai/langgraph

Low-level orchestration for controllable, stateful agents.

LangGraph models agents as graphs of nodes with checkpointed state, cycles, human-in-the-loop interrupts and durable execution. It has become the reference architecture for production agent orchestration.

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Behind the project

LangChain

The de-facto standard toolkit for building LLM applications and agents.

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LangChain makes the LangChain framework and LangGraph, the low-level orchestration standard for stateful, controllable agents, plus the LangSmith platform for tracing, evaluating and monitoring them in production.

San Francisco, CA2022~$75M raised

In the news

Open SourceOpenAI · Feb 26, 2026

OpenAI open-sources Symphony, its codex orchestration harness

OpenAI releases Symphony — open-source orchestration that turns project work into isolated, autonomous coding-agent implementation runs and surfaces the ones that pass, so teams manage outcomes instead of supervising sessions. Big Tech keeps raising the floor on what counts as a baseline harness.

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