KVM is #2 in Top 13 Virtualization platforms
KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko. KVM also requires a modified QEMU although work is underway to get the required changes upstream.
Positions in ratings
#2 in Top 13 Virtualization platforms
The best alternatives to KVM are: VMware vSphere, VirtualBox, OpenVZ, Xen, Microsoft Hyper-V