VirtualBox vs. VMware vs. Parallels

Feature

VirtualBox

Parallels Workstation / Desktop

VMware Server / Workstation

Supported host operating systems

Windows 2000, XP, 2003, Vista, 2008 Server, Windows 7, Linux, Mac OS X, Solaris 10U5+, OpenSolaris, FreeBSD (under development)

Windows 2000, XP, 2003, Vista, Linux, OS X

Windows 2000, XP, 2003, Vista, Linux (32bit and 64bit), Mac OS X

Supported guest operating systems

DOS, Windows 3.1, 95, 98, NT, 2000, XP, Vista, Windows 7, Windows Server 2003/2008, Linux, OpenBSD, FreeBSD, OS/2, Solaris, OpenSolaris, others

DOS, Windows 3.1, 95, 98, NT, 2000, XP, Vista, Linux, OS/2

DOS, Windows 3.1, 95, 98, NT, 2000, XP, Vista, Linux, FreeBSD, Solaris

64bit host OS support

yes

no

yes

64bit guest OS support

yes

yes

yes

Intel VT-x support (CPU virtualization extensions)

yes

yes

limited

AMD-V support (CPU virtualization extensions)

yes

yes

limited

Virtual network cards

up to 8

up to 5

up to 4

Virtual Disk Controller

IDE or SATA (up to 32 disks in a guest) or SCSI

IDE (up to 4)

IDE or SCSI

USB support

yes

yes

yes

iSCSI support (VMs can directly access storage servers over iSCSI)

yes

no

no

Serial ports

up to 4

up to 4

yes

Parallel ports

no

up to 3

yes

CD/DVD writing

yes

no

no

3D acceleration

yes (OpenGL 1.5)

no

limited

Support of VMware images

yes

no

n/a

Headless operation

yes

no

yes

Remote VM access

Integrated RDP server

no

limited

Remote USB support

Yes, arbitrary devices

no

no

Seamless Windows

yes

yes

yes

Shared Folders

yes

yes

yes

Guest power status reporting

yes

no

yes

API

Full API, 100% scriptable

no

yes

Open source

yes (dual licensed, some enterprise features are closed source)

no

no

Customizations

yes, upon request

no

no

License costs

Free

Workstation for Windows/Linux - $49.99, Desktop for Mac OS X - $79.99

Workstation for Windows/Linux around $189, Fusion for Mac - $79.99, Server free for end users, not redistributable