Best agent frameworks
7 tools we verified on 2026-11-05. Ordered by accessibility (free plan, then open source), not paid placement.
AutoGenTop-level documentation for AutoGen, a framework for developing applications using AI agents
Free plan: Yes · Open source: Yes · Checked 2026-11-05
CCrewAI
The Leading Multi-Agent Platform
Free plan: Yes · Open source: Yes · Checked 2026-11-05
LangGraphControl agent workflows with LangGraph: durable execution, memory, streaming, and human-in-the-loop.
Free plan: Yes · Open source: Yes · Checked 2026-11-05
LlamaIndexLlamaParse is the world's best agentic OCR for processing complex documents with messy tables, charts, images, and more with human-level accuracy.
Free plan: Yes · Open source: Yes · Checked 2026-11-05
MastraShip AI agents that reason, remember, and act in TypeScript. Mastra provides memory, tools, MCP, and observability to go from prototype to production.
Free plan: Yes · Open source: Yes · Checked 2026-11-05
OOpenAI Agents SDK
OpenAI Agents SDK
Free plan: Yes · Open source: Yes · Checked 2026-11-05
Pydantic AIHow Python does AI: agents, realtime voice, image generation, embeddings. Every model, every interface, typed end to end.
Free plan: Yes · Open source: Yes · Checked 2026-11-05