KVM vs VirtualBox: What are the differences?
Developers describe KVM as "Kernel-based Virtual Machine is a full virtualization solution for Linux". KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). On the other hand, VirtualBox is detailed as "Run nearly any operating system on a single machine and to freely switch between OS instances running simultaneously". VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL) version 2.
KVM and VirtualBox can be categorized as "Virtualization Platform" tools.