head to head · open source
strix vs SkillSpector
strix has 63,281 GitHub stars, 6,903 forks, 383 open issues and last shipped yesterday. SkillSpector has 17,624 stars, 1,504 forks, 136 open issues and last shipped yesterday. strix leads on adoption by 259% (63,281 vs 17,624 stars). strix is written in Python under Apache-2.0; SkillSpector is written in Python under Apache-2.0. strix has attracted 11% as many forks as stars, SkillSpector 9%. SkillSpector was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai-security), 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
| strix | SkillSpector | |
|---|---|---|
| GitHub stars | ★ 63K | ★ 18K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 6.9K | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick strix if
- You weight community size — 63K 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 SkillSpector if
- You want the SkillSpector feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and SkillSpector fits your workflow better
About strix
Strix is an open source AI penetration testing tool that deploys autonomous AI agents against a running codebase to find, validate, and fix application vulnerabilities, built for developers and security teams who want dynamic security testing without the cost and scheduling overhead of manual pentesting.
read the full strix overview →
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 →
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Frequently asked questions
Is strix or SkillSpector more popular?
strix has 63,281 GitHub stars and SkillSpector has 17,624. strix has the larger community by that measure.
Are strix and SkillSpector free?
Both are open source. strix is licensed under Apache-2.0 and SkillSpector under Apache-2.0. Neither carries a licence fee.
What is the difference between strix and SkillSpector?
strix is written in Python and SkillSpector in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, strix or SkillSpector?
Choose strix if you want the larger community (63,281 stars) or its Apache-2.0 licence terms. Choose SkillSpector if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.