Best Agent Framework Top 20

Agent harness operating system providing skills, instincts, memory optimization, continuous learning, and security scanning.

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

Official open-source agent harness from DeepSeek built on an "everything is a plugin" spatiotemporal composability architecture, with a built-in Web UI and a growing plugin ecosystem.

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.

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

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.

LangChain is the open-source agent engineering platform that unifies model IO, tool calling, RAG, memory and observability under one composable framework.

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.

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.

worldmonitor is an AI global event monitoring dashboard aggregating news, geopolitics, energy and market data with auto-generated briefings.

paperclip is an AI agent team orchestration and scheduling platform, managing task assignment, collaboration and state across many agents.

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

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

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.

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.

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

Open Interpreter lets LLMs execute code and control a computer locally, turning natural language into shell, Python, and browser actions on the user machine.

ai-hedge-fund is a multi-agent simulated hedge fund example, with researcher, trader, risk-manager agents collaborating on investment decisions.

orca is a developer-facing AI agent platform providing RAG, inference, hosted tooling and an end-to-end capability stack.