head to head · open source
mantis vs 0
mantis has 2,779 GitHub stars, 237 forks, 1 open issues and last shipped today. 0 has 1,356 stars, 179 forks, 3 open issues and last shipped today. mantis leads on adoption by 105% (2,779 vs 1,356 stars). mantis is written in Python under Apache-2.0; 0 is written in TypeScript under Apache-2.0. mantis has attracted 9% as many forks as stars, 0 13%. 0 was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (ai-agents, application-security, 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 | 0 | |
|---|---|---|
| GitHub stars | ★ 2.8K | ★ 1.4K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-11-15 | 2026-11-15 |
| Forks | ⑂ 237 | ⑂ 179 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick mantis if
- You weight community size — 2.8K 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 0 if
- You want the 0 feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and 0 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 0
The open source cybersecurity harness Backed by 0security automates vulnerability discovery, fixing and verification workflows. Watch the 45 second harness launch film The Swiss Applied AI & Cybersecurity Research Lab Quick start Open a new terminal after installing, or run export PATH="$HOME/.0/bin:$PATH" in the current one. 0 opens the local browser console: in Connections , add a model provider or supported subscription, choose a workspace, and start a chat. Prefer the terminal? Set a provider key and review a local repository: Review failures and incomplete coverage before reading an empty result as clean…
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Frequently asked questions
Is mantis or 0 more popular?
mantis has 2,779 GitHub stars and 0 has 1,356. mantis has the larger community by that measure.
Are mantis and 0 free?
Both are open source. mantis is licensed under Apache-2.0 and 0 under Apache-2.0. Neither carries a licence fee.
What is the difference between mantis and 0?
mantis is written in Python and 0 in TypeScript. 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 0?
Choose mantis if you want the larger community (2,779 stars) or its Apache-2.0 licence terms. Choose 0 if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.