head to head · open source
serenity vs mocha
serenity has 33,938 GitHub stars, 3,488 forks, 739 open issues and last shipped yesterday. mocha has 22,912 stars, 3,144 forks, 222 open issues and last shipped yesterday. serenity leads on adoption by 48% (33,938 vs 22,912 stars). serenity is written in C++ under BSD-2-Clause; mocha is written in JavaScript under MIT. serenity has attracted 10% as many forks as stars, mocha 14%. mocha was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (browser), 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
| serenity | mocha | |
|---|---|---|
| GitHub stars | ★ 34K | ★ 23K |
| License | BSD-2-Clause | MIT |
| Written in | C++ | JavaScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 3.5K | ⑂ 3.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick serenity if
- You weight community size — 34K stars and counting
- You want the BSD-2-Clause license terms
- Your stack matches C++
- You value the larger contributor base for long-term maintenance
pick mocha if
- You want the mocha feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and mocha fits your workflow better
About serenity
SerenityOS Graphical Unix like operating system for 64 bit x86, Arm, and RISC V computers. FAQ Documentation Build Instructions About SerenityOS is a love letter to '90s user interfaces with a custom Unix like core. It flatters with sincerity by stealing beautiful ideas from various other systems. Roughly speaking, the goal is a marriage between the aesthetic of late 1990s productivity software and the power user accessibility of late 2000s \ nix. This is a system by us, for us, based on the things we like. You can watch videos of the system being developed on YouTube: Andreas Kling's channel Linus Groh's…
read the full serenity overview →
About mocha
☕️ Classic, reliable, trusted test framework for Node.js and the browser ☕️ Links Documentation Release Notes / History / Changes Code of Conduct Contributing Development Discord (ask questions here!) Issue Tracker Backers Become a backer and show your support to our open source project on our site. Sponsors Does your company use Mocha? Ask your manager or marketing team if your company would be interested in supporting our project. Support will allow the maintainers to dedicate more time for maintenance and new features for everyone. Also, your company's logo will show on GitHub and on our site who doesn't want…
read the full mocha overview →
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Frequently asked questions
Is serenity or mocha more popular?
serenity has 33,938 GitHub stars and mocha has 22,912. serenity has the larger community by that measure.
Are serenity and mocha free?
Both are open source. serenity is licensed under BSD-2-Clause and mocha under MIT. Neither carries a licence fee.
What is the difference between serenity and mocha?
serenity is written in C++ and mocha 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, serenity or mocha?
Choose serenity if you want the larger community (33,938 stars) or its BSD-2-Clause licence terms. Choose mocha if its feature set, stack or MIT licence fits better. Both are self-hostable.