head to head · open source
Avalonia vs feathers
Avalonia has 31,517 GitHub stars, 2,826 forks, 1,875 open issues and last shipped yesterday. feathers has 15,263 stars, 798 forks, 121 open issues and last shipped 7 days ago. Avalonia leads on adoption by 106% (31,517 vs 15,263 stars). Avalonia is written in C# under MIT; feathers is written in TypeScript under MIT. Avalonia has attracted 9% as many forks as stars, feathers 5%. Avalonia was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (browser), 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
| Avalonia | feathers | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 15K |
| License | MIT | MIT |
| Written in | C# | TypeScript |
| Last push | 2026-09-17 | 2026-09-11 |
| Forks | ⑂ 2.8K | ⑂ 798 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Avalonia if
- You weight community size — 32K stars and counting
- You want the MIT license terms
- Your stack matches C#
- You value the larger contributor base for long-term maintenance
pick feathers if
- You want the feathers feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and feathers fits your workflow better
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 →
About feathers
Feathers is a full stack framework for creating web APIs and real time applications with TypeScript or JavaScript. It lives in the Node.js and npm ecosystem, and it is published as a set of packages, with the core available as @feathersjs/feathers . The project has existed for roughly 15 years and is maintained under the MIT license by its contributors.
read the full feathers overview →
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Frequently asked questions
Is Avalonia or feathers more popular?
Avalonia has 31,517 GitHub stars and feathers has 15,263. Avalonia has the larger community by that measure.
Are Avalonia and feathers free?
Both are open source. Avalonia is licensed under MIT and feathers under MIT. Neither carries a licence fee.
What is the difference between Avalonia and feathers?
Avalonia is written in C# and feathers in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Avalonia or feathers?
Choose Avalonia if you want the larger community (31,517 stars) or its MIT licence terms. Choose feathers if its feature set, stack or MIT licence fits better. Both are self-hostable.