Skype is a proprietary Voice Over IP service and software application that was first released in 2003. The service allows communication via voice, instant messaging, and video and is currently available for most major desktop and mobile operating systems.

Skype allows calls to be made to landlines, other VoIP users, and mobile phones. Calls to other Skype users are free, while calls to mobile phones and landlines are charged via bundle plans or pay-per-use rates. Skype uses its own proprietary protocol, which competes with SIP and H.323-based protocols used by other voice over IP apps.

The Skype brand was first acquired by eBay on September 12, 2005 for $2.6 billion USD. Microsoft purchased Skype in 2011 for $8.5 billion USD.

Skype's first major new feature in a long time -- video messaging -- began internal testing in February 2013 before being officially rolled out to all platforms except Windows Phone on June 17, 2013, though users on Windows Phone can still receive and view these messages.

Skype is currently the most widely used VoIP service in the world by a large margin, with more than 70 million downloads of the application occurring on the Android OS alone as of June 2012. Microsoft merged Skype with its Windows Live Messenger service everywhere except mainland China on April 8th, giving Skype a user base of roughly 350 million, though the company hasn't publicly released its user count in some time. The company has, however, revealed a goal to hit 1 billion total users.



Microsoft Releases Technical Preview of Its New Skype for Business Client

Skype for Business, Enterprise apps, Microsoft Lync

We first caught wind of Lync’s rebranding to Skype for Business back in November 2014, and now that vision has been realized with the release…

Skype 7.5 for Mac Released, Bringing 14 New Languages and Bug Fixes

Skype for Mac, Skype app, calling and messaging

This morning, Skype released version 7.5 of its calling and messaging app for Mac, an update that adds 14 new languages and fixes some crashes…

Skype Qik for iOS and Android Update Adds Improved Sharing Capabilities

Skype Qik, Qik video messaging, send video messages

If you’re using Skype Qik, a video messaging service from Microsoft that was acquired by Skype back in 2011 and relaunched and rebranded in October,…

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