head to head · open source
mantis vs concord-mcp
mantis has 2,452 GitHub stars, 210 forks, 1 open issues and last shipped yesterday. concord-mcp has 517 stars, 27 forks, 34 open issues and last shipped 2 days ago. mantis leads on adoption by 374% (2,452 vs 517 stars). mantis is written in Python under Apache-2.0; concord-mcp is written in TypeScript under MIT. mantis has attracted 9% as many forks as stars, concord-mcp 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 | concord-mcp | |
|---|---|---|
| GitHub stars | ★ 2.5K | ★ 517 |
| License | Apache-2.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-10-16 | 2026-10-15 |
| Forks | ⑂ 210 | ⑂ 27 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick mantis if
- You weight community size — 2.5K 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 concord-mcp if
- You want the concord-mcp feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and concord-mcp 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 concord-mcp
Concord MCP is an open source, local first communication and coordination layer that lets AI coding agents in different harnesses message each other and share work state through a single MCP server, and it is intended for developers and teams running more than one coding agent in the same repository.
read the full concord-mcp overview →
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Frequently asked questions
Is mantis or concord-mcp more popular?
mantis has 2,452 GitHub stars and concord-mcp has 517. mantis has the larger community by that measure.
Are mantis and concord-mcp free?
Both are open source. mantis is licensed under Apache-2.0 and concord-mcp under MIT. Neither carries a licence fee.
What is the difference between mantis and concord-mcp?
mantis is written in Python and concord-mcp 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 concord-mcp?
Choose mantis if you want the larger community (2,452 stars) or its Apache-2.0 licence terms. Choose concord-mcp if its feature set, stack or MIT licence fits better. Both are self-hostable.