head to head · open source
uBlock vs Avalonia
uBlock has 69,018 GitHub stars, 4,422 forks, 15 open issues and last shipped 2 days ago. Avalonia has 31,743 stars, 2,878 forks, 1,875 open issues and last shipped yesterday. uBlock leads on adoption by 117% (69,018 vs 31,743 stars). uBlock is written in JavaScript under GPL-3.0; Avalonia is written in C# under MIT. uBlock has attracted 6% as many forks as stars, Avalonia 9%. Avalonia 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.
← all 20902 open source comparisons
Side by side
| uBlock | Avalonia | |
|---|---|---|
| GitHub stars | ★ 69K | ★ 32K |
| License | GPL-3.0 | MIT |
| Written in | JavaScript | C# |
| Last push | 2026-11-01 | 2026-11-02 |
| Forks | ⑂ 4.4K | ⑂ 2.9K |
| 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 Avalonia if
- You want the Avalonia feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and Avalonia 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 Avalonia
📖 About Avalonia is a cross platform UI framework for dotnet, providing a flexible styling system and supporting a wide range of platforms such as Windows, macOS, Linux, iOS, Android and WebAssembly. Avalonia is mature and production ready and is used by companies, including Schneider Electric, Unity, JetBrains and GitHub. Considered by many to be the spiritual successor to WPF, Avalonia UI provides a familiar, modern development experience for XAML developers creating cross platform applications. While Avalonia UI is similar to WPF, it isn't a 1:1 copy, and you'll find plenty of improvements. For those seeking…
read the full Avalonia overview →
More in Productivity & Utilities
Related comparisons
More Browsers & Extensions projects
Compare either of these against the rest of the Browsers & Extensions field.
Frequently asked questions
Is uBlock or Avalonia more popular?
uBlock has 69,018 GitHub stars and Avalonia has 31,743. uBlock has the larger community by that measure.
Are uBlock and Avalonia free?
Both are open source. uBlock is licensed under GPL-3.0 and Avalonia under MIT. Neither carries a licence fee.
What is the difference between uBlock and Avalonia?
uBlock is written in JavaScript and Avalonia 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 Avalonia?
Choose uBlock if you want the larger community (69,018 stars) or its GPL-3.0 licence terms. Choose Avalonia if its feature set, stack or MIT licence fits better. Both are self-hostable.