Last week Uno turned two years old in the open! At Microsoft Build 2018 we stepped into the world of Open Source after developing Uno for our internal purposes for 5 years prior to open sourcing it. It’s been quite a journey. We want to thank all of you who have contributed to it in any shape or form – submitting an issue or PR, trying it, using it,  blogging about it, hosting an event about it or just encouraging us from a side to keep on working on our quest of making WinUI run everywhere.

To celebrate the 2nd birthday we wanted to take this moment to look back at some of the bigger milestones we achieved together with you. So in no particular order, here they come.

About Uno Platform

For those new to Uno Platform – it enables for creation of single-source C# and XAML apps which run natively on iOS and Android, macOS and Web via WebAssembly. Uno Platform is Open Source (Apache 2.0) and available on GitHub. To learn more about Uno Platform, see how it works, or create a small sample app.

And if you made it this long down the post, you deserve an Uno t-shirt. Just email us at with your shirt size and your address and we will send you one. The first 10 people to email us at  will get a t-shirt. Also, come celebrate with us at this summer’s virtual UnoConf –

Uno Platform Team

Uno Platform 5.2 LIVE Webinar – Today at 3 PM EST – Watch