About Avalonia UI
The open-source .NET framework behind cross-platform applications at NASA, JetBrains, and Unity
Our impact in 2025
122M+
Avalonia builds in 2025
2.1M
Projects using Avalonia
19
Avalonians worldwide
13+
Years of development
Avalonia started as one developer's side project in 2013. Today it's the leading open-source framework for building cross-platform .NET applications — used by NASA, JetBrains, Unity, and thousands of teams shipping to every major platform from a single codebase.
Built everywhere, for everywhere
We're a remote-first team of 19, headquartered in Tallinn, with Avalonians across 11 countries. Our team works across time zones to maintain and advance the framework, ship commercial tooling like Avalonia XPF and Avalonia Accelerate, and provide direct support to enterprises building mission-critical applications.
What drives us
Three principles that shape every decision we make — from the framework architecture to how we run the company.
Stability
Microsoft's shift toward Cloud and AI has left .NET desktop developers facing difficult decisions. Not every application can move to the cloud, and many mission-critical systems need a stable, future-proof modernization path. Every decision we make comes back to building a platform teams can rely on for years.
Performance
Faster rendering, lower memory usage, smoother animations. It's rarely the glamorous work, but we measure every frame and allocation so your users get consistent, platform-native interactions on every target.
Developer-first
We're a company of engineers, building for engineers. From the XAML dialect to the debugging tools to the support model, everything is designed around developer productivity.
History of Avalonia
Key milestones from Avalonia's first commit to the framework powering thousands of production .NET applications today.
2026:
Avalonia 12.0 Released
Meet the team
19 Avalonians across 11 countries. We're small on purpose — every person on this team ships code, talks to customers, and shapes the framework.
Mike James
Chief Executive Officer
Michael Sivers
Chief Operations Officer
Steven Kirk
Chief Technology Officer
Nikita Tsukanov
Chief Research Officer
Anastassia Pellja
Software Developer
Benedikt Stebner
Software Developer
Dalton Hurd
Head of Design
Emmanuel Hansen
Software Developer
Jan Kučera
Software Developer
Javier Suárez
Software Developer
Julien Lebosquain
Software Developer
Jumar Macato
Software Developer
Luke Malpass
Developer Relations
Matt Lacey
Software Developer
Max Katz
Software Developer
Tim Miller
Software Developer
Yiu Luke
Technical Writer
Chosen by teams shipping cross-platform .NET applications
From developer tools to space exploration, these teams build with Avalonia.
Trusted by .NET teams around the world
Join the team and build the future of .NET UI
We're a small, engineering-led team on a mission to build the best UI framework for .NET. We look for smart, independent, creative problem solvers who want to do meaningful work with real autonomy.