Runs on either OS
What Plesk gives you on a VPS
Plesk is a hosting control panel. Domains, mailboxes, databases, DNS and certificates all sit behind one login. The WordPress Toolkit handles installs, cloning, staging and mass updates across every site on the server. It runs on Linux and on Windows, which is usually what decides it against the alternatives.
The licence is a separate purchase from Plesk, priced by edition according to how many domains you host. Our template installs the panel and leaves the key to you, so an agency changing servers carries across the licence it already owns and pays no markup on top. Underneath it all sits an ordinary KVM VPS with full root, so anything the panel doesn't expose is still yours to do from the shell.