Citrix Systems Inc.  is a multinational  company founded in 1989, providing technologies for desktop and server virtualization , networking, Software-as-a-Service (SaaS), and cloud computing, including open source Xen products . It provides its solutions to more than 400,000 companies around the world           and is headquartered in Fort  Lauderdale , Florida and Santa Clara, California , with subsidiaries in California and Massachusetts and other development centers in Australia, Canada, Denmark, Germany, India and the United Kingdom.               

Following the acquisition of XenSource in October 2007, Citrix leads the Xen  open source hypervisor project