head to head · open source
slate vs Avalonia
slate has 31,748 GitHub stars, 3,302 forks, 653 open issues and last shipped 5 days ago. Avalonia has 31,517 stars, 2,826 forks, 1,875 open issues and last shipped yesterday. slate leads on adoption by 1% (31,748 vs 31,517 stars). slate is written in TypeScript under MIT; Avalonia is written in C# under MIT. slate has attracted 10% 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. 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
| slate | Avalonia | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 32K |
| License | MIT | MIT |
| Written in | TypeScript | C# |
| Last push | 2026-09-13 | 2026-09-17 |
| Forks | ⑂ 3.3K | ⑂ 2.8K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick slate if
- You weight community size — 32K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- 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 slate
Slate is a completely customizable framework for building rich text editors, written in TypeScript and released under the MIT licence, for JavaScript and React developers who need an editor that goes well past what a fixed schema can offer.
read the full slate 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 slate or Avalonia more popular?
slate has 31,748 GitHub stars and Avalonia has 31,517. slate has the larger community by that measure.
Are slate and Avalonia free?
Both are open source. slate is licensed under MIT and Avalonia under MIT. Neither carries a licence fee.
What is the difference between slate and Avalonia?
slate is written in TypeScript 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, slate or Avalonia?
Choose slate if you want the larger community (31,748 stars) or its MIT licence terms. Choose Avalonia if its feature set, stack or MIT licence fits better. Both are self-hostable.