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Open source · Python

Best Python autonomous agents

The open-source autonomous agents written in Python, from the Agent Search Engine index — ranked by real maintained adoption (GitHub stars and recent commit activity), never by sponsorship. Every project here is Python-first, self-hostable, and free to run; the trade-off is you host and maintain it yourself. Right now it's led by AutoGPT (187k stars), with browser-use and deer-flow close behind. Rankings shift as projects gain stars and ship commits.

9 open-source records · all autonomous agents · more best-of lists · how we rank

AutoGPTAgentAutoGPT is the vision of accessible AI for everyone, to use and to build on. Our mission is to provide the tools, so that you can focus on what matters.Python · 187k stars · Aug 2026browser-useAgentMake websites accessible for AI agents. Automate tasks online with ease.Python · 109k stars · MIT · Aug 2026deer-flowAgentAn open-source long-horizon SuperAgent harness that researches, codes, and creates.Python · 80k stars · MIT · Aug 2026nanobotAgentLightweight, open-source AI agent for your tools, chats, and workflows.Python · 47k stars · MIT · Aug 2026CowAgentAgentOpen-source super AI assistant & Agent Harness. Plans tasks, runs tools and skills, self-evolves with memory and knowledge. Multi-model, multi-channel. Lightweight, extensible, one-line install.Python · 47k stars · MIT · Aug 2026agnoAgentBuild, run, and manage agent platforms.Python · 42k stars · Apache-2.0 · Aug 2026wshobson/agentsPlatformMulti-harness agentic plugin marketplace for Claude Code, Codex CLI, Cursor, OpenCode, GitHub Copilot, and Gemini CLIPython · 39k stars · MIT · Aug 2026agenticSeekAgentFully Local Manus AI. No APIs, No $200 monthly bills. Enjoy an autonomous agent that thinks, browses the web, and code for the sole cost of electricity.Python · 27k stars · GPL-3.0 · Aug 2026agentic_securityAgentAgentic LLM Vulnerability Scanner / AI red teaming kitPython · 2.0k stars · Apache-2.0 · Jul 2026

Frequently asked

What are the best Python autonomous agents?
The Python projects listed below, ranked by maintained adoption — GitHub stars plus recent commit activity — so you see what's genuinely used and still maintained, not abandoned.
Are these Python autonomous agents open source and free?
Yes — every project on this page is open source and written primarily in Python. The software is free to run and self-host; you still pay for the infrastructure you run it on and any model or API usage it makes.
Why choose Python autonomous agents specifically?
Staying in your team's primary language — Python — makes self-hosting, extending, and debugging far easier, because you can read and modify the source directly instead of treating it as a black box.