Avalonia
Avalonia: A XAML-based .NET framework for shared UI across desktop, mobile and WebAssembly. Ranked #19 of 24 in Ui Frameworks by our editors (6.6/10); pricing: Free plan; best for .NET teams targeting desktop, mobile, and WebAssembly.
At a glance
- Editor score6.6 / 10
- PricingFree plan
- Best for.NET teams targeting desktop, mobile, and WebAssembly
- Free planYes
- Paid from€299/seat/yr
- Framework modelComponent
- Founded2019 · Tallinn, Estonia
- Facts checked25 Sep 2026
Where it wins
- Shared XAML UI can target desktop, mobile and WebAssembly.
- Includes 70+ open-source controls and accessibility APIs.
- Free MIT-licensed plan supports cross-platform development.
Where it doesn't
- Advanced IDE tooling and Hot Reload require a paid plan.
- Specialty controls such as PDF Viewer are limited to Pro and above.
- Enterprise costs €21,000 per year.
Our verdict on Avalonia
Avalonia is an open-source UI framework for .NET applications, aimed at teams building for desktop, mobile and WebAssembly from shared code. Developers define interfaces with XAML and write application logic in C# or F#. Its platforms include Windows, macOS, Linux, iOS, Android and WebAssembly. The framework uses its own Skia-based rendering engine, and its architecture supports shared view models. That makes it a fit for .NET teams that want a common UI approach across device types; teams needing server rendering should look elsewhere, since this framework does not offer it.
The free Avalonia plan is MIT-licensed, cross-platform and includes 70+ built-in controls, with community support via GitHub. Plus costs €299 per seat per year and adds advanced IDE tooling, Avalonia for Visual Studio, DevTools, Parcel and Hot Reload. Pro costs €899 per seat per year and includes Plus features along with Media Player, Tree DataGrid, Rich Text Editor, PDF Viewer, and 70+ charts and data visualizations. Enterprise is €21,000 per year and adds engineering support, contracted response times, five years of security updates on LTS releases, premium control source code and air-gapped activation. The published prices are in EUR and exclude VAT.
Avalonia's breadth is strongest for teams that value a shared XAML-based approach, built-in controls, and accessibility automation peers and platform accessibility APIs across desktop and mobile. Paid subscriptions expand tooling and component options rather than changing the core cross-platform model. A solo developer or small team can start with the free framework; teams that need IDE tooling or specialty components can assess Plus or Pro against their needs. Enterprise is aimed at organizations requiring engineering support, contracted response times or air-gapped activation. If server-side rendering is central to the project, or the team does not work with .NET and XAML, another framework is a better fit.
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Avalonia pricing
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Avalonia fact sheet
| Free plan | Yes |
|---|---|
| Paid from | €299/seat/yr |
| Framework model | Component |
| Supported frameworks | .NET, XAML, C#, F# |
| Accessibility features | Yes |
| Server rendering support | No |
| Mobile support | Both |
| TypeScript support | Not verified |
| Deployment | Desktop, Mobile |
| Platforms | Web, Windows, macOS, Linux, iOS, Android |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan (source) |
| Website | avaloniaui.net |
| Facts checked | 25 Sep 2026 |
Alternatives to Avalonia
- Vue.jsAn open-source frontend framework for component-based interfaces, from HTML enhancements to single-page apps.9.3
- Ionic FrameworkA web-based mobile UI toolkit with native deployment paths for iOS and Android.9.1
- Carbon Design SystemA free, multi-framework design system for teams aligning code, design assets, and guidance.9.0
See all Avalonia alternatives →
Also Ranked In
Avalonia is ranked in 4 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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