Find the best open-source AI tools

525 open-source AI tools across 8 categories, ranked by GitHub stars and built from public data.

525 tools · 8 categories · 12.4M combined GitHub stars · Updated October 18, 2026

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rea

Reverse engineer anything with agents, from app behavior down to native binaries.

AI Agents322k stars

ECC

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first…

AI Agents283k stars

hermes-agent

The agent that grows with you

AI Agents255k stars

deepseek-harness

DeepSeek Harness: Everything is a Plugin.

AI Agents253k stars

firecrawl

Supercharge your AI agents with data from the web and beyond. Building the library for superintelligence. 🔥

AI Agents193k stars

prompts.chat

f.k.a. Awesome ChatGPT Prompts. Share, discover, and collect prompts from the community. Free and open…

Chat UIs173k stars

ponytail

Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.

AI Agents167k stars

open-webui

User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

RAG & Search156k stars

langflow

Langflow is a powerful tool for building and deploying AI-powered agents and workflows.

Chat UIs156k stars

langchain

The agent engineering platform.

AI Agents148k stars

awesome-llm-apps

100+ AI Agents, Agent Skills and RAG Apps - Free and Open Source.

RAG & Search142k stars

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rea

Reverse engineer anything with agents, from app behavior down to native binaries.

AI Agents322k stars

hermes-agent

The agent that grows with you

AI Agents255k stars

firecrawl

Supercharge your AI agents with data from the web and beyond. Building the library for superintelligence. 🔥

AI Agents193k stars

gemini-cli

An open-source AI agent that brings the power of Gemini directly into your terminal.

AI Agents107k stars

paperclip

The open-source app everyone uses to manage agents at work

AI Agents104k stars

orca

Orca is the place for working with a fleet of agents (e.g. Grok Bot, Claude Code). Run any coding agent with…

AI Agents97k stars

archify

Turn any idea, plan, or codebase into a beautiful interactive diagram. An agent skill for Claude Code…

AI Agents85k stars

deer-flow

An open-source long-horizon SuperAgent harness that researches, codes, and creates. With the help of…

AI Agents84k stars