What is VirtualBox?

VirtualBox is one of the many providers that Vagrant supports. VirtualBox is a powerful virtualization tool that allows you to create virtual environments on your existing operating system. It allows you to fully customize a virtual machine's hardware, such as the RAM, CPU, hard drive, audio, and graphics.

VirtualBox was initially released in January 2007 by the company Innotek GmbH, which was later acquired by Sun Microsystems, which, in turn, was acquired by the Oracle Corporation. Oracle is actively maintaining and releasing new versions of VirtualBox.

VirtualBox is built in x86 Assembly, C++, and C. It can run and supports many different operating systems, such as Windows, Linux, Solaris, and OS X.