head to head · open source
mantis vs claude-code-skills
mantis has 1,665 GitHub stars, 160 forks, 1 open issues and last shipped 2 days ago. claude-code-skills has 566 stars, 84 forks, 0 open issues and last shipped 4 days ago. mantis leads on adoption by 194% (1,665 vs 566 stars). mantis is written in Python under Apache-2.0; claude-code-skills is written in PowerShell under MIT. mantis has attracted 10% as many forks as stars, claude-code-skills 15%. mantis was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai-agents, code-review), 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
| mantis | claude-code-skills | |
|---|---|---|
| GitHub stars | ★ 1.7K | ★ 566 |
| License | Apache-2.0 | MIT |
| Written in | Python | PowerShell |
| Last push | 2026-09-18 | 2026-09-16 |
| Forks | ⑂ 160 | ⑂ 84 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick mantis if
- You weight community size — 1.7K 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 claude-code-skills if
- You want the claude-code-skills feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches PowerShell
- You evaluated both and claude-code-skills fits your workflow better
About mantis
Mantis is a modular, stack agnostic toolkit of security review skills for AI coding agents, and it includes an ADK reference harness for building secure software. It lives in the developer tools, AI coding agent, and application security ecosystem, with topics such as code review, DevSecOps, multi agent systems, and hardware security. The project helps agents autonomously find, reproduce, and patch vulnerabilities while giving humans a structured way to review results.
read the full mantis overview →
About claude-code-skills
Claude Codex Skills is an MIT licensed collection of installable agent skills for Claude Code and Codex that gives an AI agent a clear finish line: establish the intended outcome, work within scope, verify the result, and make remaining gaps explicit.
read the full claude-code-skills overview →
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Frequently asked questions
Is mantis or claude-code-skills more popular?
mantis has 1,665 GitHub stars and claude-code-skills has 566. mantis has the larger community by that measure.
Are mantis and claude-code-skills free?
Both are open source. mantis is licensed under Apache-2.0 and claude-code-skills under MIT. Neither carries a licence fee.
What is the difference between mantis and claude-code-skills?
mantis is written in Python and claude-code-skills in PowerShell. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, mantis or claude-code-skills?
Choose mantis if you want the larger community (1,665 stars) or its Apache-2.0 licence terms. Choose claude-code-skills if its feature set, stack or MIT licence fits better. Both are self-hostable.