head to head · open source
Avalonia vs mocha
Avalonia has 31,517 GitHub stars, 2,826 forks, 1,875 open issues and last shipped yesterday. mocha has 22,894 stars, 3,151 forks, 222 open issues and last shipped yesterday. Avalonia leads on adoption by 38% (31,517 vs 22,894 stars). Avalonia is written in C# under MIT; mocha is written in JavaScript under MIT. Avalonia has attracted 9% as many forks as stars, mocha 14%. 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 | mocha | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 23K |
| License | MIT | MIT |
| Written in | C# | JavaScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 2.8K | ⑂ 3.2K |
| 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 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 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 mocha
Mocha is a classic, reliable and trusted test framework for Node.js and the browser, distributed as an open source JavaScript module under the MIT licence and aimed at JavaScript developers and package maintainers who need to write and run automated tests inside a Node.js process or in a browser environment.
read the full mocha overview →
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Frequently asked questions
Is Avalonia or mocha more popular?
Avalonia has 31,517 GitHub stars and mocha has 22,894. Avalonia has the larger community by that measure.
Are Avalonia and mocha free?
Both are open source. Avalonia is licensed under MIT and mocha under MIT. Neither carries a licence fee.
What is the difference between Avalonia and mocha?
Avalonia is written in C# 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, Avalonia or mocha?
Choose Avalonia if you want the larger community (31,517 stars) or its MIT licence terms. Choose mocha if its feature set, stack or MIT licence fits better. Both are self-hostable.