head to head · open source
mantis vs flock
mantis has 2,704 GitHub stars, 224 forks, 1 open issues and last shipped 2 days ago. flock has 501 stars, 6 forks, 2 open issues and last shipped 10 days ago. mantis leads on adoption by 440% (2,704 vs 501 stars). mantis is written in Python under Apache-2.0; flock is written in Go under MIT. mantis has attracted 8% as many forks as stars, flock 1%. mantis was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (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 | flock | |
|---|---|---|
| GitHub stars | ★ 2.7K | ★ 501 |
| License | Apache-2.0 | MIT |
| Written in | Python | Go |
| Last push | 2026-11-03 | 2026-10-26 |
| Forks | ⑂ 224 | ⑂ 6 |
| 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 flock if
- You want the flock feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and flock 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 flock
English · Русский · 中文 · Español · Deutsch · Français · Português (BR) · 日本語 Flock Run a Claude Code AI dev team on your server and drive it from chat. Describe a feature in Telegram, VK or LO; the team plans it, builds it on a branch, tests it, reviews it, and opens a PR — each chat in its own isolated workspace. It runs on your Claude Pro/Max subscription (no per token billing) or an Anthropic API key, ships as prebuilt Docker images (no build step), and keeps every chat in its own sandboxed workspace. Quick start (Docker) That pulls the prebuilt image ghcr.io/duckbugio/flock telegram — no build, no Ansible —…
read the full flock overview →
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Frequently asked questions
Is mantis or flock more popular?
mantis has 2,704 GitHub stars and flock has 501. mantis has the larger community by that measure.
Are mantis and flock free?
Both are open source. mantis is licensed under Apache-2.0 and flock under MIT. Neither carries a licence fee.
What is the difference between mantis and flock?
mantis is written in Python and flock in Go. 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 flock?
Choose mantis if you want the larger community (2,704 stars) or its Apache-2.0 licence terms. Choose flock if its feature set, stack or MIT licence fits better. Both are self-hostable.