There are some open source options that come close to what vmware's offerings could do, but virtualbox for sure ain't that. It has an extremely limited feature

There are some open source options that come close to what vmware's offerings could do, but virtualbox for sure ain't that. It has an extremely limited feature set compared to other offerings in this space. For example, it is mainly intended to manage VMs on a single host. Most organizations looking at commercial offerings have multiple hosts (or racks, or even datacenters) they want to manage. Apples are much more similar to oranges than vmware is to virtualbox.