# AI agent frameworks

10 apps ranked by verified data.
Source: https://altcatalog.com/category/ai-agent-frameworks/

## Apps

- [Agno](https://altcatalog.com/alternatives/agno.md) — Full-stack framework for multi-agent systems
- [AutoGen](https://altcatalog.com/alternatives/autogen.md) — Microsoft framework for multi-agent conversations
- [CrewAI](https://altcatalog.com/alternatives/crewai.md) — Framework for orchestrating role-playing AI agents
- [Haystack](https://altcatalog.com/alternatives/haystack.md) — Open-source framework for LLM and RAG pipelines
- [LangGraph](https://altcatalog.com/alternatives/langgraph.md) — Framework for stateful, multi-agent workflows
- [LlamaIndex](https://altcatalog.com/alternatives/llamaindex.md) — Data framework for LLM apps and agents
- [Mastra](https://altcatalog.com/alternatives/mastra.md) — TypeScript framework for AI agents and workflows
- [OpenAI Agents SDK](https://altcatalog.com/alternatives/openai-agents-sdk.md) — Lightweight framework for building agents
- [Pydantic AI](https://altcatalog.com/alternatives/pydantic-ai.md) — Type-safe agent framework from the Pydantic team
- [Semantic Kernel](https://altcatalog.com/alternatives/semantic-kernel.md) — Microsoft SDK to build AI agents in C#, Python, Java

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Ranked by verified data, never by who paid. https://altcatalog.com/trust/