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unoplatform
uno
C#2019–2025
unoplatform / uno

uno

Open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps from a single C#/XAML codebase. Work from any IDE/CLI with Hot Reload, Visual Designer, MCPs, and Skills built for modern .NET workflows. 200M+ NuGet downloads.

Developer ToolsCommand LineWeb DevelopmentSystems & InfrastructureHardware & EmbeddedMobile & DesktopAutomation & Workflows
Explore on GitHubRead Hacker News discussions
8Distinct people
13Mentions
0Explicit recommenders
10.1KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps from a single C#/XAML codebase. Work from any IDE/CLI with Hot Reload, Visual Designer, MCPs, and Skills built for modern .NET workflows. 200M+ NuGet downloads.

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year13 dated mentions

Observed mentions: 2019-11-27 15:27:08 UTC to 2025-11-26 14:32:12 UTC.

01232019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments20192020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 2 mentions; 1 submissions, 1 comments20222023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2025-01-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 2 mentions; 1 submissions, 1 comments2025

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC101
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC303
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC202
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC211
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC101
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC202
20252025-01-01 00:00:00 UTC2026-01-01 00:00:00 UTC211

What Hacker News says

13 sources
sasakrsmanovic2·Nov 26, 2025Submission

Modernizing Legacy Apps with AI

It might actually turn out that if you were sitting on an unmaintained legacy app, the timing actually works out for you:), funny twist of fate. MCP servers now make the modernization path a lot more straightforward. A tech journalist Paul Thurrott once published an open-source Notepad clone, NotepadWPF (https://github.com/thurrott/NotepadWPF) , as a way to examine modern Windows UI patterns. The NotepadWPF s was converted using AI from windows-only to a cross-platform app running on linux, mac, windows and Web in under three minutes. The AI system produced a functional modernized application which is 99% identical to the original. Original app and source code was used to feed AI – the resulting video is here - https://youtu.be/7-l_ZsZdIb0. AI is from https://github.com/unoplatform/uno
1 points · Open discussion
zigzag312·Jul 30, 2025
https://github.com/MonoGame/MonoGame (runs even on consoles, which is rare for open source game frameworks and engines) https://github.com/SubtitleEdit/subtitleedit https://github.com/jellyfin/jellyfin https://github.com/AvaloniaUI/Avalonia https://github.com/bitwarden/server https://github.com/unoplatform/uno https://github.com/files-community/Files https://github.com/NickeManarin/ScreenToGif https://github.com/DevToys-app/DevToys https://github.com/d2phap/ImageGlass https://github.com/ShareX/ShareX https://github.com/duplicati/duplicati https://github.com/OpenRA/OpenRA https://en.wikipedia.org/wiki/Ryujinx https://sourceforge.net/projects/keepass/ https://github.com/orchardcms https://github.com/piranhacms/piranha.core https://github.com/umbraco/Umbraco-CMS
In .NET 10 Preview 6 brings JIT improvements, one-shot tool execution
jlaban-uno·May 2, 2024
Uno Platform maintainer here - We're maintaining production apps ourselves, like NuGet Package Explorer [1], or Uno Calculator [2], and many third-party apps are in production, with some shown in case studies [3]. You can also find some other tech Wasm demos [4] on our repo. 1: https://nuget.info 2: https://calculator.platform.uno 3: https://platform.uno/case-studies 4: https://github.com/unoplatform/uno#live-webassembly-apps
In Uno: Create Beautiful Cross Platform .NET Apps Faster
jlaban-uno·Nov 5, 2020
- Uno dev here Fair comment. Here are some other live Wasm apps examples: https://github.com/unoplatform/uno#live-webassembly-apps. Note that .NET for WebAssembly is still in its early stages and the .NET team is likely to continue working on AOT compilation in the coming months, and the Uno team is going to help. This will be improving the payload size and performance that is currently very much lacking in that mode. Interpreted IL mode (the UADO app) is used where the AOT engine is not yet working properly, providing a base to get the framework itself progressing, while the infrastructure rest is improving. Many of the .NET constructs are expecting exception handling (https://github.com/WebAssembly/exception-handling), which has to be emulated as it is not yet available in WebAssembly, adding significant code to the payload. Same for ot
Read the rest
her features like null reference checking or indirect invocations (some may know more on that last one). Other features like lazy WebAssembly loading (for more than 4KB at least) and Interface Types to remove any Javascript (https://github.com/WebAssembly/interface-types/blob/master/p...) will also improve the actual and perceived performance significantly. The immediate goal of the project is to provide the ability for new and existing C# apps (and not Web sites, not yet at least) to be available for non-walled garden environments. We expect the field to progress significantly in the coming years on many fronts, making this kind of apps more useful and viable. Finally, you'll find that the Windows Calculator port to Uno is actually stretching thin the browsers resources because of the size of the Wasm payload (browser's memory and CPU is going really high because of the internal WebAssembly management). Yet, once the tiered compiler has cached the result, the load time goes down significantly.
In Uno: Single-Codebase for Windows, WebAssembly, iOS, macOS, Android and Linux
octopoc·Nov 5, 2020
Here are some differences I was able to find: - Uno uses the UWP API and XAML, whereas Avalonia uses a derivative of WPF - Uno renders using the underlying platform, uses native controls whenever possible, particularly for input controls. Avalonia focuses on using its controls, not native ones (although support for native controls is WIP I think) - Uno is based on WinUI, so in theory WinUI components should be usable in Uno apps - Uno supports WebAssembly, but not Linux and MacOS natively Links: - https://github.com/unoplatform/uno/issues/17 - https://github.com/AvaloniaUI/Avalonia/issues/587
In Uno: Single-Codebase for Windows, WebAssembly, iOS, macOS, Android and Linux

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