Skype Technologies (also known as Skype Software, Skype Communications, Skype Inc., and Skype Limited) was a telecommunications company headquartered in Luxembourg City, whose chief business was the development and marketing of the video chat and instant messaging computer software program Skype, and various Internet telephony services associated with it. Microsoft purchased the company in 2011, and it had since then operated as their wholly owned subsidiary; as of 2016, it was operating as part of Microsoft's Office Product Group. The company was a société à responsabilité limitée, or SARL, equivalent to an American limited liability company.
Skype, a voice over IP (VoIP) service, was first released in 2003 as a way to make free computer-to-computer calls, or reduced-rate calls from a computer to telephones. Support for paid services such as calling landline/mobile phones from Skype (formerly called SkypeOut), allowing landlines and mobile phones to call Skype (formerly called SkypeIn and now Skype Number), and voice messaging generated the majority of Skype's revenue.