Greg Woock, Joe Sipher
Sideline is a mobile application that enables users to add a second phone number to their smartphones. Users can choose their phone number, make calls using their carrier, send unlimited messages and manage their calls with voicemail, caller ID and auto reply. The company was launched in 2006 and has given out more than 120 million phone numbers.
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Larry Page, Sergey Brin
Google Voice is an application developed by Google that allows users to call, text and send voicemail for free. Google Account holders can set up a Google Voice account by selecting a US phone number...
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Niklas Zennström and Janus Friis
Skype is an telecommunications app that allows people to place voice or video calls and exchange messages online. Sign-up is quick and easy, and free, as well as the service. Aside from calls and...
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