head to head · open source
SkillSpector vs nono
SkillSpector has 17,624 GitHub stars, 1,504 forks, 136 open issues and last shipped yesterday. nono has 4,121 stars, 272 forks, 201 open issues and last shipped yesterday. SkillSpector leads on adoption by 328% (17,624 vs 4,121 stars). SkillSpector is written in Python under Apache-2.0; nono is written in Rust under Apache-2.0. SkillSpector has attracted 9% as many forks as stars, nono 7%. SkillSpector was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (agent-security, ai-security, mcp), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| SkillSpector | nono | |
|---|---|---|
| GitHub stars | ★ 18K | ★ 4.1K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Rust |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 1.5K | ⑂ 272 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick SkillSpector if
- You weight community size — 18K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick nono if
- You want the nono feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and nono fits your workflow better
About SkillSpector
SkillSpector is an open source security scanner for AI agent skills that detects vulnerabilities, malicious patterns, prompt injection, data exfiltration, and supply chain risk in Claude Code, Codex CLI, Gemini CLI, and MCP skills before they are installed — built for developers who install agent skills and for security teams that vet or publish them.
read the full SkillSpector overview →
About nono
nono is a Rust project for secure multiplexed execution paths for AI agents. It lives in AI security and privacy. It is built by the team that brought Sigstore. It aims to run agents with zero trust, zero setup, and zero latency.
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Frequently asked questions
Is SkillSpector or nono more popular?
SkillSpector has 17,624 GitHub stars and nono has 4,121. SkillSpector has the larger community by that measure.
Are SkillSpector and nono free?
Both are open source. SkillSpector is licensed under Apache-2.0 and nono under Apache-2.0. Neither carries a licence fee.
What is the difference between SkillSpector and nono?
SkillSpector is written in Python and nono in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, SkillSpector or nono?
Choose SkillSpector if you want the larger community (17,624 stars) or its Apache-2.0 licence terms. Choose nono if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.