head to head · open source
Avalonia vs Deta Surf
Avalonia has 31,756 GitHub stars, 2,879 forks, 1,875 open issues and last shipped 2 days ago. Deta Surf has 3,617 stars, 252 forks, 32 open issues and last shipped 2 months ago. Avalonia leads on adoption by 778% (31,756 vs 3,617 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 | 2026-11-03 | 2026-08-24 |
| Forks | ⑂ 2.9K | ⑂ 252 |
| 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
📖 About Avalonia is a cross platform UI framework for dotnet, providing a flexible styling system and supporting a wide range of platforms such as Windows, macOS, Linux, iOS, Android and WebAssembly. Avalonia is mature and production ready and is used by companies, including Schneider Electric, Unity, JetBrains and GitHub. Considered by many to be the spiritual successor to WPF, Avalonia UI provides a familiar, modern development experience for XAML developers creating cross platform applications. While Avalonia UI is similar to WPF, it isn't a 1:1 copy, and you'll find plenty of improvements. For those seeking…
read the full Avalonia overview →
About Deta Surf
Website Discord Deta Surf: Your AI Notebook Deta Surf is an AI notebook that brings all your files and the web directly into your stream of thought. It’s meant for simultaneous research and thinking that minimizes the grunt work: manually searching, opening windows & tabs, scrolling, copying and pasting into a document editor. Surf is primarily built in Svelte, TypeScript and Rust, runs on MacOS, Windows & Linux, stores data locally in open formats, and is open source. Motivation Most applications are focused on a single task, or a single media type: notes, websites, or PDFs. Real thinking requires juggling…
read the full Deta Surf overview →
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Frequently asked questions
Is Avalonia or Deta Surf more popular?
Avalonia has 31,756 GitHub stars and Deta Surf has 3,617. 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 (31,756 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.