Uno Platform is an open-source framework for building cross-platform native applications for mobile, web, desktop, and embedded systems from a single C# and XAML codebase.
The platform addresses the challenge of maintaining separate codebases for different platforms by providing a unified development model based on the WinUI 3 API surface. Developers write C# and XAML once and compile to native applications across iOS, Android, WebAssembly, Windows, macOS, Linux, and embedded targets. The framework uses Skia for hardware-accelerated rendering on desktop platforms and provides hundreds of UI controls from WinUI, the Windows Community Toolkit, and the Uno Toolkit, along with theming options for Material, Fluent, and Cupertino design systems.
Teams should consider Uno Platform if they have existing C# and XAML expertise and need to reach multiple platforms without fragmenting their codebase. It suits enterprise applications where code reuse and maintainability across platforms are priorities. The platform includes state management options ranging from traditional MVVM to the modern MVUX pattern, plus extensions for navigation, logging, and dependency injection. For developers evaluating alternatives, the README does not name competing frameworks for direct comparison.
The project maintains active development with contributions from a substantial community and is used by enterprise clients for mission-critical applications. Development activity shows ongoing investment in the core framework, with continuous expansion of platform support and developer tooling. The ecosystem includes Uno Platform Studio, a separate productivity suite offering AI-native features like prompt-to-app generation, visual design handoff, and runtime visual design capabilities integrated with Visual Studio, VS Code, and JetBrains Rider.
