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Calista Technologies was a company that provided virtual device solutions for Windows. The general premise behind the technology was to provide an abstract virtual view of a hosting machine's devices from within a virtual machine through drivers for Windows Vista and Windows XP, and present the user interaction to thin clients through the Remote Desktop Protocol (RDP). The technology is shipping in the production releases of Windows Server 7 in various components , and the display portion of the technology is the basis for Microsoft's RemoteFX solution.
The company was founded by Neal Margulis in 2006, and raised $7 million in series A funding by Greylock Partners and Lightspeed Ventures. The company produced a Beta version of the product and had several customer trials underway. The product utilized both x86- and GPU-based code as well as allowing for hardware based acceleration.
Calista Technologies was acquired by Microsoft in January 2008 for approximately $115 million.