Agent frameworksOpen source
CrewAI
by CrewAI
Build teams of AI agents with defined roles.
Prices and features change often — check the official site for current plans. This listing is not an endorsement.
Best for
Role-based multi-agent projects.
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.
Learn to use tools like this
Similar tools
Model Context Protocol (MCP)
A shared standard for connecting AI apps to tools and data.
Agent Development Kit (ADK)
Google's open toolkit for building and running agents.
LangChain & LangGraph
Popular code libraries for building AI apps, including LangGraph for step-by-step agent flows.
LlamaIndex
A toolkit focused on connecting AI to your own documents and data.