head to head · open source
uBlock vs mocha
uBlock has 69,033 GitHub stars, 4,427 forks, 15 open issues and last shipped yesterday. mocha has 22,912 stars, 3,144 forks, 222 open issues and last shipped yesterday. uBlock leads on adoption by 201% (69,033 vs 22,912 stars). uBlock is written in JavaScript under GPL-3.0; mocha is written in JavaScript under MIT. uBlock has attracted 6% as many forks as stars, mocha 14%. uBlock was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (javascript), 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
| uBlock | mocha | |
|---|---|---|
| GitHub stars | ★ 69K | ★ 23K |
| License | GPL-3.0 | MIT |
| Written in | JavaScript | JavaScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 4.4K | ⑂ 3.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick uBlock if
- You weight community size — 69K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches JavaScript
- 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 uBlock
[![Badge Commits]][Commit Rate] [![Badge Issues]][Issues] [![Badge Localization]][Crowdin] [![Badge License]][License] [![Badge NPM]][NPM] [![Badge Mozilla]][Mozilla] ![Badge Chrome] [![Badge Edge]][Edge] uBlock Origin (uBO) GitHub Releases Stable and development versions on Firefox, Chromium MV2, and Thunderbird. Must be placed manually into web browsers; the Chromium and Thunderbird versions usually won't auto update. Related: uBlock Origin Lite uBlock Origin (uBO) is a CPU and memory efficient [wide spectrum content blocker][Blocking] for Chromium and Firefox. It blocks ads, trackers, coin miners, popups…
read the full uBlock 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 uBlock or mocha more popular?
uBlock has 69,033 GitHub stars and mocha has 22,912. uBlock has the larger community by that measure.
Are uBlock and mocha free?
Both are open source. uBlock is licensed under GPL-3.0 and mocha under MIT. Neither carries a licence fee.
What is the difference between uBlock and mocha?
uBlock is written in JavaScript 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, uBlock or mocha?
Choose uBlock if you want the larger community (69,033 stars) or its GPL-3.0 licence terms. Choose mocha if its feature set, stack or MIT licence fits better. Both are self-hostable.