LangGraph

Open source · MITFree (paid hosted platform optional)

LangGraph

by LangGraph

A Python and JavaScript library for building agents that keep state and can pause, retry and resume.

42.8k stars on GitHub, Oct 2026

Why it's useful

For when you're building your own agent rather than using one: you lay out the steps as a graph and it handles memory, human sign-off points and recovering from failures.

What it needs

Python or JavaScript, and an API key for whichever model you use, or a local model.

The details

Price
Free (paid hosted platform optional)
Licence
Open source (MIT)
Made by
LangGraph
Category
Agents & MCP

Image: LangGraph. LangGraph belongs to LangGraph; we just think it's worth knowing about.

More tools like this