Top · OSS-50
The 50 best open-source AI agents.
Every agent here has an OSI-approved license — MIT, Apache 2.0, BSD, MPL, GPL or AGPL. You can self-host, fork, and run on your own infrastructure with no API key requirement.
Read the full OSS-50 index or jump to comparison.
| # | Agent | 24h | Score | Δ24h |
|---|---|---|---|---|
| 1 | open-design open-design: ???? Local-first, open-source alternative to Anthropic's Claude Design. ??? 19 Skills ?? ??? 71 brand-grade Design Systems ???? Generate web ?? desktop ?? mobile prototypes ?? slides ?? images ?? videos ?? HyperFrames ???? Sandboxed preview ?? HTML/PDF/PPTX/MP4 export ???? Runs on Claude Code / Codex... | 69.1 | -0.08 | |
| 2 | ECC ECC: The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. | 64.7 | +0.02 | |
| 3 | gemini-cli gemini-cli: An open-source AI agent that brings the power of Gemini directly into your terminal. | 63.3 | -0.01 | |
| 4 | caveman caveman: ???? why use many token when few token do trick ??? Claude Code skill that cuts 65% of tokens by talking like caveman. | 1 |
Common questions
- Why pick an open-source agent?
- Three reasons people most often cite: no vendor lock-in, full code visibility (audit before you ship), and self-hosting (data stays in your VPC).
- Are these as good as proprietary alternatives?
- Some are, some aren't. Use the AgentScore plus the Compare page to evaluate against proprietary alternatives. The methodology page documents how the scores are computed.
Methodology and source code are public — read how AgentScore works.