Server virtualization is no longer a one-horse race, as Microsoft, Citrix and others compete more convincingly with market leader VMware
VMware has enjoyed a long run as king of x86 server virtualization, and the pioneering vendor remains the one to beat when tallying enterprise market share. But its competitors, particularly Microsoft and Citrix Systems, are gaining ground as IT executives begin to view server virtualization not only as a means to cut costs in the data center but also as a baseline technology for enabling cloud computing.
VMware introduced its first x86 server virtualization products in 2001. It wasn’t until a few years later that the first commercial versions of the open source Xen virtualization hypervisor hit the market, and Microsoft’s release of Hyper-V followed in 2008.