Agent frameworksOpen source
LangChain & LangGraph
by LangChain
Popular code libraries for building AI apps, including LangGraph for step-by-step agent flows.
Prices and features change often — check the official site for current plans. This listing is not an endorsement.
Best for
Agents with clear control flow, loops and approvals.
How to choose · Agent frameworks
Start with the simplest loop you can write yourself. Adopt a framework only for a feature you need, and keep your own logic separate.