As of October 19, 2007, XenSource, Inc. was acquired by Citrix Systems, Inc. XenSource, Inc. develops, markets, and sells enterprise grade virtualization solutions. The company offers Xen 3.0, an open source hypervisor virtualization technology that provides features required for servers deployed in enterprise; Xen Optimiser, a multi-server virtualization infrastructure software management solution; and Xen Support, a subscription-based support for Xen and XenOptimizer. It also provides value-added enterprise solutions, including enterprise grade virtualization infrastructure solutions. The company offers its solutions based on open source Xen hypervisor, a virtualization technology. Its solutions allow enterprises to enhance server utilization, server consolidation, and data center capabilities. The company was founded in 2004 and is headquartered in Palo Alto, California.