Citrix Systems, Inc. is an American multinational software company founded in 1989 that provides server, application and desktop virtualization, networking, software-as-a-service (SaaS), and cloud computing technologies.The company began by developing remote access products for Microsoft operating systems. It licensed source code from Microsoft and has been in partnership with the company throughout its history. Citrix came to prominence in the 1990s as a leader in thin client technology.