The 17 Best AI Agent Frameworks
The best AI agent frameworks in 2026, compared by features and pricing. 17 offer a free tier. Every tool is verified live and re-checked weekly, so the list never rots.
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Fast, lightweight framework for multimodal agents.
From Free
Anthropic’s SDK for building agents on Claude.
From Free
Framework for orchestrating role-playing agent crews.
From Free
Framework for programming, not prompting, LLMs.
From Free
Python framework for agents, pipelines, and workflows.
From Free
Open-source framework for LLM search and agents.
From Free
Popular framework for building LLM apps and agents.
From Free
Graph-based library for stateful, multi-actor agents.
From Free
Framework for agents with long-term memory.
From Free
Data framework for RAG and knowledge agents.
From Free
TypeScript framework for building AI agents.
From Free
Microsoft’s unified SDK for enterprise AI agents.
From Free
Microsoft framework for multi-agent conversations.
From Free
Lightweight SDK for building agents from OpenAI.
From Free
Type-safe agent framework from the Pydantic team.
From Free
Microsoft SDK for integrating AI into apps.
From Free
Minimalist agent library from Hugging Face.
From Free
AI Agent Frameworks — FAQ
How many AI agent frameworks are there?
We track and verify 17 AI agent frameworks live, with the list re-checked every week so it stays current.
Are there free AI agent frameworks?
Yes — 17 of the 17 agent frameworks we track offer a free tier, free trial, or are open source. Free options are shown in the list above.
What are the best AI agent frameworks?
Popular AI agent frameworks include Agno, Claude Agent SDK, CrewAI. The best one depends on your budget and use case — compare features and pricing above, all verified live.