Parallels is a software company based in Bellevue, Washington; it is primarily involved in the development of virtualization software for macOS. The company has offices in 15 countries, including the United States, Germany, United Kingdom, France, Japan, China, Spain, Russia, Australia and Ukraine, and has over 800 employees.
Privately held server automation and virtualization software company SWSoft developed software for running data centers, particularly for web-hosting services companies and application service providers. Their Virtuozzo product was an early system-level server virtualization solution, and in 2003 they bought Plesk, a commercial web hosting platform.
SWsoft's acquisition of Parallels was more or less kept under wraps until January 2004, two years before Parallels became mainstream. In 2004 SWsoft acquired Parallels, Inc. and Parallels Workstation for Windows and Linux 2.0 was released, with Parallels Desktop for Mac following in mid 2006. Later the same year the corporate headquarters moved from Herndon, Virginia to Renton, Washington.
At Apple's Worldwide Developers Conference 2007 in San Francisco, California, Parallels announced and demonstrated its upcoming Parallels Server for Mac. Parallels Server for Mac will reportedly allow IT managers to run multiple server operating systems on a single Mac Xserve.
In 2007 the German company Netsys GmbH sued Parallels' German distributor Avanquest for copyright violation, then Parallels Server for Mac was announced at WWDC - and later Parallels Technology Network.