head to head · open source
uBlock vs Avalonia
uBlock has 67,923 GitHub stars, 4,353 forks, 15 open issues and last shipped yesterday. Avalonia has 31,517 stars, 2,826 forks, 1,875 open issues and last shipped yesterday. uBlock leads on adoption by 116% (67,923 vs 31,517 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%. 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 | Avalonia | |
|---|---|---|
| GitHub stars | ★ 68K | ★ 32K |
| License | GPL-3.0 | MIT |
| Written in | JavaScript | C# |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 4.4K | ⑂ 2.8K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick uBlock if
- You weight community size — 68K 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
uBlock Origin is a CPU and memory efficient, wide spectrum content blocker for Chromium and Firefox, aimed at anyone who wants ads, trackers, coin miners, popups, anti blockers and malware sites neutralised by default without hand tuning anything.
read the full uBlock overview →
About Avalonia
Avalonia is a cross platform UI framework for .NET, written in C and driven by XAML. It provides a flexible styling system and targets a wide range of platforms, including Windows, macOS, Linux, iOS, Android and WebAssembly. The project is mature and production ready, and it is used by companies such as Schneider Electric, Unity, JetBrains and GitHub. It lives in the .NET ecosystem and is distributed through the NuGet package manager.
read the full Avalonia overview →
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Frequently asked questions
Is uBlock or Avalonia more popular?
uBlock has 67,923 GitHub stars and Avalonia has 31,517. 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 (67,923 stars) or its GPL-3.0 licence terms. Choose Avalonia if its feature set, stack or MIT licence fits better. Both are self-hostable.