head to head · open source
mocha vs thorium
mocha has 22,894 GitHub stars, 3,151 forks, 222 open issues and last shipped yesterday. thorium has 7,508 stars, 283 forks, 140 open issues and last shipped 26 days ago. mocha leads on adoption by 205% (22,894 vs 7,508 stars). mocha is written in JavaScript under MIT; thorium is written in C++ under BSD-3-Clause. mocha has attracted 14% as many forks as stars, thorium 4%. mocha was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| mocha | thorium | |
|---|---|---|
| GitHub stars | ★ 23K | ★ 7.5K |
| License | MIT | BSD-3-Clause |
| Written in | JavaScript | C++ |
| Last push | 2026-09-17 | 2026-08-23 |
| Forks | ⑂ 3.2K | ⑂ 283 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick mocha if
- You weight community size — 23K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick thorium if
- You want the thorium feature set and don't need the biggest community
- You prefer the BSD-3-Clause license terms
- Your stack matches C++
- You evaluated both and thorium fits your workflow better
About mocha
Mocha is a classic, reliable and trusted test framework for Node.js and the browser, distributed as an open source JavaScript module under the MIT licence and aimed at JavaScript developers and package maintainers who need to write and run automated tests inside a Node.js process or in a browser environment.
read the full mocha overview →
About thorium
Thorium is a BSD 3 Clause licensed Chromium fork, written in C++ and named after radioactive element No. 90, that ships optimised Linux builds here while Windows, macOS, Android and Raspberry Pi builds live in companion repositories.
read the full thorium overview →
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Frequently asked questions
Is mocha or thorium more popular?
mocha has 22,894 GitHub stars and thorium has 7,508. mocha has the larger community by that measure.
Are mocha and thorium free?
Both are open source. mocha is licensed under MIT and thorium under BSD-3-Clause. Neither carries a licence fee.
What is the difference between mocha and thorium?
mocha is written in JavaScript and thorium in C++. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, mocha or thorium?
Choose mocha if you want the larger community (22,894 stars) or its MIT licence terms. Choose thorium if its feature set, stack or BSD-3-Clause licence fits better. Both are self-hostable.