head to head · open source
Avalonia vs BrowserOS
Avalonia has 31,756 GitHub stars, 2,879 forks, 1,875 open issues and last shipped 2 days ago. BrowserOS has 14,245 stars, 1,531 forks, 82 open issues and last shipped yesterday. Avalonia leads on adoption by 123% (31,756 vs 14,245 stars). Avalonia is written in C# under MIT; BrowserOS is written in TypeScript under AGPL-3.0. Avalonia has attracted 9% as many forks as stars, BrowserOS 11%. BrowserOS 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 | BrowserOS | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 14K |
| License | MIT | AGPL-3.0 |
| Written in | C# | TypeScript |
| Last push | 2026-11-03 | 2026-11-04 |
| Forks | ⑂ 2.9K | ⑂ 1.5K |
| 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 BrowserOS if
- You want the BrowserOS feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and BrowserOS 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 BrowserOS
Website · Docs · Enterprise Free · Open source · Everything runs on your machine A second browser, just for your AI agents. Import your logins from Chrome in one click, connect Claude Code, Codex, or any MCP agent, and hand off your web tasks. Agents run in parallel in their own tabs. You watch live, or replay any session like a video. BrowserOS neo is not a Chrome replacement. It is a secondary browser that sits next to Chrome, made friendly to agents. Get started 1. Install BrowserOS neo Prefer a direct download? Grab it for macOS or Windows. 2. Import from Chrome One click brings over your logins, bookmarks…
read the full BrowserOS overview →
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Frequently asked questions
Is Avalonia or BrowserOS more popular?
Avalonia has 31,756 GitHub stars and BrowserOS has 14,245. Avalonia has the larger community by that measure.
Are Avalonia and BrowserOS free?
Both are open source. Avalonia is licensed under MIT and BrowserOS under AGPL-3.0. Neither carries a licence fee.
What is the difference between Avalonia and BrowserOS?
Avalonia is written in C# and BrowserOS 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 BrowserOS?
Choose Avalonia if you want the larger community (31,756 stars) or its MIT licence terms. Choose BrowserOS if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.