This isn't just VirtualBox. It's VirtualBox with a KVM back end. So you get the performance of KVM, but with a much better GUI than virt-manager.

That's pretty cool. Also, TIL there's a virtualbox kvm backend.

Doesn't Virtualbox require kernel modules to run? How does that work in a flatpak?

One small downside…

This is not in FlatHub and it is not an official part of the VirtualBox KVM project from Cyberos Technology (the folks that make VirtualBox KVM).

This is a project from GitHub user tulilirockz

Cool that it is now a flatpak

However, I would recommend gnome boxes or virtual manager.

This is awesome. I use the KVM version of VirtualBox all the time. Not only is it a great UI with good driver support but VirtualBox itself is cross platform while KVM and its various front-ends are not.

I do demos and create documentation that shows VirtualBox in screenshots. The audience are people who will almost all be using Windows and macOS. With VirtualBox, we can all use the same UI with me enjoying better performance from KVM on my Linux boxes.

VirtualBox KVM does not need kernel modules so kernel upgrades are not a hassle. Before now though, I have been having to compile VirtualBox KVM itself which is a bit of a beast.

I cannot wait to try this.