The best replacement for xen is vmware.

The best alternatives to xen are rated as following:
★★★★★  vmware
★★★★★  kvm
★★★★  virtualbox
★★★  openvz
★★  esxi
★★  xenserver
★  esx
★  qemu
★  tali
★  kvm 2013
★  hyper-v
★  proxmox
  vmware server
  hyper v
  xcp
  vsphere
  kvm which is better
  uml
  st tropez
  openstack
  virtuozzo
  citrix
  vmware esx
  kvm performance
  kvm 2012
  virtual iron
  kvm vps
  wmware
  vserver

Your alternative for xen is not listed? Suggest!
Speaking about xen, one probably shouldn't forget about centos.

Other search terms related to xen and their ratings are:
★★★★★ centos
★★★ openstack
★★★ hardware virtualization
★★★ drbd
★★ virt-manager
★ openvswitch
★ qemu
★ fedora
★ opensuse
libvirt
shorewall
You have in mind a companion for xen and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of xen in all years. Click on graph for more.
xen
vmware
kvm