CloudLinux?

So, I'm looking to rent a VPS to host a site and stuff, there's a reasonably priced provider in my country, the only thing is when I went to check the OS the machine runs I was expecting something like Ubuntu server, Debian or maybe some RHEL-compatible, what TF is cloud Linux? All that I could find online is the company's site and not much more. Somebody knows if it's a debian or a RHEL-like? What package system they use and such? Thanks.