Best AI agents for multi agent

Listed alphabetically; we don't rank paid placements.

Microsoft's open-source framework for multi-agent conversations.

Free and open source (you pay your own LLM API costs)

Python framework for orchestrating role-playing multi-agent crews.

Basic free (50 workflow executions/mo); Enterprise custom; open-source framework free

Framework from LangChain for building stateful, controllable agent graphs.

Library free and open source; LangSmith Developer $0/seat, Plus $39/seat/mo

Lightweight Python framework from OpenAI for multi-agent workflows with handoffs and guardrails.

Free and open source (you pay your own LLM API costs)