head to head · open source
Avalonia vs Deta Surf
Avalonia has 31,530 GitHub stars, 2,825 forks, 1,875 open issues and last shipped 2 days ago. Deta Surf has 3,572 stars, 251 forks, 32 open issues and last shipped 27 days ago. Avalonia leads on adoption by 783% (31,530 vs 3,572 stars). Avalonia is written in C# under MIT; Deta Surf is written in TypeScript under Apache-2.0. Avalonia has attracted 9% as many forks as stars, Deta Surf 7%. 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.
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Side by side
| Avalonia | Deta Surf | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 3.6K |
| License | MIT | Apache-2.0 |
| Written in | C# | TypeScript |
| Last push | 2026-09-18 | 2026-08-24 |
| Forks | ⑂ 2.8K | ⑂ 251 |
| 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 Deta Surf if
- You want the Deta Surf feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and Deta Surf 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 Deta Surf
Deta Surf is an open source AI notebook and browser workspace. It combines tabs, split view, a sidebar, local files, web pages, and generated notes in one application. The project lives in the productivity and browser extension ecosystem, and it is built primarily with Svelte, TypeScript, and Rust. It runs on MacOS, Windows, and Linux.
read the full Deta Surf overview →
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Frequently asked questions
Is Avalonia or Deta Surf more popular?
Avalonia has 31,530 GitHub stars and Deta Surf has 3,572. Avalonia has the larger community by that measure.
Are Avalonia and Deta Surf free?
Both are open source. Avalonia is licensed under MIT and Deta Surf under Apache-2.0. Neither carries a licence fee.
What is the difference between Avalonia and Deta Surf?
Avalonia is written in C# and Deta Surf 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 Deta Surf?
Choose Avalonia if you want the larger community (31,530 stars) or its MIT licence terms. Choose Deta Surf if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.