head to head · open source
mantis vs agent-manager
mantis has 1,720 GitHub stars, 167 forks, 1 open issues and last shipped 10 days ago. agent-manager has 531 stars, 55 forks, 58 open issues and last shipped yesterday. mantis leads on adoption by 224% (1,720 vs 531 stars). mantis is written in Python under Apache-2.0; agent-manager is written in Go under Apache-2.0. mantis has attracted 10% as many forks as stars, agent-manager 10%. agent-manager 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, code-review, gemini-cli), 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 | agent-manager | |
|---|---|---|
| GitHub stars | ★ 1.7K | ★ 531 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Go |
| Last push | 2026-09-18 | 2026-09-27 |
| Forks | ⑂ 167 | ⑂ 55 |
| 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 agent-manager if
- You want the agent-manager feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and agent-manager 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 agent-manager
agent manager is an Apache 2.0, Go based terminal interface that runs every AI coding agent a developer already has side by side — Claude Code, Codex, OpenCode, Grok, Gemini CLI, Pi, Command Code, and Hermes Agent — and gathers their live status, quick prompts, worktrees, and diff review into a single tmux TUI.
read the full agent-manager overview →
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Frequently asked questions
Is mantis or agent-manager more popular?
mantis has 1,720 GitHub stars and agent-manager has 531. mantis has the larger community by that measure.
Are mantis and agent-manager free?
Both are open source. mantis is licensed under Apache-2.0 and agent-manager under Apache-2.0. Neither carries a licence fee.
What is the difference between mantis and agent-manager?
mantis is written in Python and agent-manager 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 agent-manager?
Choose mantis if you want the larger community (1,720 stars) or its Apache-2.0 licence terms. Choose agent-manager if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.