Kinda, yeah. It’s an open source but commercial product. The stable releases are paid, the beta is free. I’ve only been running a three machine cluster for a few months now, but it’s been absolutely solid despite power outages, internet outages, a hard drive going pop…
Weirdly, I installed Project 99 recently from Lutris. Ran like a dream, no issues. I’m on Fedora 39 on a Ryzen/RTX machine.