Best AI agent frameworks

Open-source LLM application framework — chains, agents, RAG, and 700+ integrations with 127K GitHub stars

Python RAG framework — connect LLMs to 160+ data sources with production-grade retrieval pipelines

Python framework for orchestrating role-playing multi-agent AI teams

Microsoft's open-source framework for conversational multi-agent AI systems

Microsoft's open-source SDK for AI orchestration — plugins, agents, and LLM integration for C#, Python, and Java

Open-source LLM app platform — build, test, and deploy AI workflows and chatbots

Drag-and-drop UI for building LangChain chatbots and RAG pipelines

Open-source workflow automation with AI agents and 400+ integrations

Visual IDE for building and debugging LLM applications — node-based workflow editor by Ironclad

Visual LLM workflow builder — drag-and-drop RAG and agent pipelines with LangChain

Open-source LLM framework for RAG and NLP pipelines — production-ready by deepset

TypeScript AI SDK for React and Node — streaming, tool use, and multi-provider LLM integration with 1M+ npm downloads/week