Best AI agents for build your own agent
Listed alphabetically; we don't rank paid placements.
AutoGen
Microsoft's open-source framework for multi-agent conversations.
Free and open source (you pay your own LLM API costs)CrewAI
Python framework for orchestrating role-playing multi-agent crews.
See siteLangGraph
Framework from LangChain for building stateful, controllable agent graphs.
Library free and open source; LangSmith Developer $0/seat, Plus $39/seat/mon8n
Workflow automation platform with AI agent nodes; self-hostable.
See siteOpenAI Agents SDK
Lightweight Python framework from OpenAI for multi-agent workflows with handoffs and guardrails.
Free and open source (you pay your own LLM API costs)Pydantic AI
Type-safe Python agent framework from the Pydantic team.
Free and open source (you pay your own LLM API costs)