head to head · open source
mantis vs autoprompt-skill
mantis has 2,704 GitHub stars, 224 forks, 1 open issues and last shipped 2 days ago. autoprompt-skill has 1,230 stars, 67 forks, 1 open issues and last shipped 1 months ago. mantis leads on adoption by 120% (2,704 vs 1,230 stars). mantis is written in Python under Apache-2.0; autoprompt-skill is written in JavaScript under MIT. mantis has attracted 8% as many forks as stars, autoprompt-skill 5%. 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 | autoprompt-skill | |
|---|---|---|
| GitHub stars | ★ 2.7K | ★ 1.2K |
| License | Apache-2.0 | MIT |
| Written in | Python | JavaScript |
| Last push | 2026-11-03 | 2026-10-04 |
| Forks | ⑂ 224 | ⑂ 67 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick mantis if
- You weight community size — 2.7K 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 autoprompt-skill if
- You want the autoprompt-skill feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and autoprompt-skill fits your workflow better
About mantis
Mantis: Portable Toolkit for Building Secure Software [!CAUTION] USE AT YOUR OWN RISK. BE EXTREMELY CAREFUL. This suite is designed to generate and execute autonomously generated code that may be unstable or perform unexpected actions. USE THIS ONLY IN ISOLATED, RESTRICTED ENVIRONMENTS. Never run this suite on a machine with access to production systems, sensitive data, or internal networks. [!IMPORTANT] RESPONSIBLE USE AI models are non deterministic and can hallucinate findings or generate incorrect patches. All findings must be manually verified by a security expert before being reported. Do not mass file…
read the full mantis overview →
About autoprompt-skill
Autoprompt is a coding agent workflow that cuts failures by 45% by reviewing, fixing, and rechecking its work. English 中文 한국어 Español العربية Contents Install · Benchmarks · Invocation · Run controls · Workflow · Agents · Examples · FAQ · License Install Use the CLI below, or download an installer from GitHub Releases. 1. Install the CLI 2. Launch the installer 3. Install Choose your coding agent, confirm its path, and install. N means enter another path. For another CLI or IDE, choose Custom coding agent and use the compatibility guide. Install from source Requirements Node.js 20+ Python 3.11+ available as…
read the full autoprompt-skill overview →
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Frequently asked questions
Is mantis or autoprompt-skill more popular?
mantis has 2,704 GitHub stars and autoprompt-skill has 1,230. mantis has the larger community by that measure.
Are mantis and autoprompt-skill free?
Both are open source. mantis is licensed under Apache-2.0 and autoprompt-skill under MIT. Neither carries a licence fee.
What is the difference between mantis and autoprompt-skill?
mantis is written in Python and autoprompt-skill in JavaScript. 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 autoprompt-skill?
Choose mantis if you want the larger community (2,704 stars) or its Apache-2.0 licence terms. Choose autoprompt-skill if its feature set, stack or MIT licence fits better. Both are self-hostable.