Best Agent Framework Top 20

AutoGPT is an autonomous AI agent that can complete user-defined tasks end-to-end. It plans and executes steps on its own and is considered a milestone in agent autonomy.

Langflow is a visual AI agent and workflow builder platform with drag-and-drop design, multi-LLM integration, and tool composition to simplify agent development.

An autonomous AI agent framework from NousResearch that supports multiple LLM backends and grows with user needs.

Dify is an open-source LLM application development platform with a visual agent orchestration interface, supporting workflows, knowledge bases, and multiple models.

LangChain is a framework for building applications powered by language models. It provides core capabilities such as chaining, memory management, and agent orchestration, making it a go-to choice for AI agent development.

AI research automation agent by Andrej Karpathy that automatically runs nanochat training research experiments on a single GPU.

OpenHands is an open-source AI software engineering agent platform that can automatically execute development tasks, modify code, and support collaborative iteration.

Unified Efficient Fine-Tuning of 100+ LLMs & VLMs. Supports LoRA, QLoRA, RLHF and more for building custom agent models.

The Multi-Agent Framework for building the first AI Software Company, enabling natural language programming with multi-role collaboration for automated requirement analysis, design, coding, and testing.

12 Lessons to Get Started Building AI Agents by Microsoft. Hands-on curriculum covering core agent concepts, tool use, and multi-agent collaboration.

An open-source agent harness platform providing the best agent toolkit, supporting multiple AI coding agents.

A multi-agent collaboration framework where AI agents form crews to accomplish complex tasks together. Role definition, task assignment, tool sharing, and process orchestration.

Build agents that monitor and act on your behalf. Create automated agents for Twitter, weather monitoring, web scraping, and many other scenarios.

The leading agent orchestration platform for Claude. Deploy intelligent multi-agent swarms, coordinate autonomous workflows, and build conversational AI systems. Features enterprise-grade architecture, distributed swarm intelligence, RAG integration, and native Claude Code/Codex integration.

Pi Mono is a comprehensive AI agent toolkit including a coding agent CLI, unified LLM API, TUI and web UI libraries, Slack bot, and vLLM pod management for end-to-end agent development.

CowAgent (formerly chatgpt-on-wechat) is a powerful AI assistant framework built on LLMs with autonomous planning, tool use, long-term memory, multi-agent collaboration, and multi-channel integration for WeChat, Feishu, DingTalk, and more.

nanobot is an ultra-lightweight personal AI agent that supports multiple LLM backends for quickly deploying a private intelligent assistant.

Fabric is an open-source framework for augmenting humans using AI, providing a modular system of crowdsourced AI prompts for solving specific problems anywhere.

Agno is a high-performance agent framework for building multimodal AI agents with memory, knowledge, and tool-use capabilities, supporting multiple LLM providers.

Phidata is a framework for building AI agents with memory, knowledge, and tool integration to make agents more capable and useful.