head to head · open source
uBlock vs serenity
uBlock has 69,033 GitHub stars, 4,427 forks, 15 open issues and last shipped yesterday. serenity has 33,938 stars, 3,488 forks, 739 open issues and last shipped yesterday. uBlock leads on adoption by 103% (69,033 vs 33,938 stars). uBlock is written in JavaScript under GPL-3.0; serenity is written in C++ under BSD-2-Clause. uBlock has attracted 6% as many forks as stars, serenity 10%. uBlock 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
| uBlock | serenity | |
|---|---|---|
| GitHub stars | ★ 69K | ★ 34K |
| License | GPL-3.0 | BSD-2-Clause |
| Written in | JavaScript | C++ |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 4.4K | ⑂ 3.5K |
| 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 serenity if
- You want the serenity feature set and don't need the biggest community
- You prefer the BSD-2-Clause license terms
- Your stack matches C++
- You evaluated both and serenity 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 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 →
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Frequently asked questions
Is uBlock or serenity more popular?
uBlock has 69,033 GitHub stars and serenity has 33,938. uBlock has the larger community by that measure.
Are uBlock and serenity free?
Both are open source. uBlock is licensed under GPL-3.0 and serenity under BSD-2-Clause. Neither carries a licence fee.
What is the difference between uBlock and serenity?
uBlock is written in JavaScript and serenity 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, uBlock or serenity?
Choose uBlock if you want the larger community (69,033 stars) or its GPL-3.0 licence terms. Choose serenity if its feature set, stack or BSD-2-Clause licence fits better. Both are self-hostable.