Users may have more than one account; it is not possible to count users, only accounts.
The volume of international traffic routed via Skype is significant. Later, a mobile version was created for Windows Phones.
Voice chat allows telephone calls between pairs of users and conference calling and uses a proprietary audio codec.
Skype supports conference calls, video chats, and screen sharing between 25 people at a time for free.
On 20 November 2014, Microsoft Office's team announced that a new chat powered by Skype is going to be implemented in their software, giving tools to be able to chat with co-workers in the same document.
Silver Lake, Andreessen Horowitz, and the Canada Pension Plan Investment Board announced the acquisition of 65% of Skype for $1.9 billion from e Bay, which attributed to the enterprise a market value of $2.92 billion.
Microsoft bought Skype in May 2011 for $8.5 billion.
This was made available from Windows Store when the new OS launched on 26 October 2012.
The following year, it became the default messaging app for Windows 8.1, replacing the Windows 8 Messaging app at the time, and became pre-installed software on every device that came with or upgraded to 8.1.) is a telecommunications application software product that specializes in providing video chat and voice calls between computers, tablets, mobile devices, the Xbox One console, and smartwatches via the Internet and to regular telephones. Much of the service is free, but Skype Credit or a subscription is required to call a landline or a mobile phone number.Skype additionally provides instant messaging services. Users may transmit both text and video messages, and may exchange digital documents such as images, text, and video. At the end of 2010, there were over 660 million worldwide users, with over 300 million estimated active each month as of August 2015.On 21 December 2015, Gurdeep Singh Pall, Corporate Vice President of Skype, announced that Microsoft acquired the technology from Talko, "maker of an innovative mobile app for on-the-go business communications (...) Together, the new technology and talent will help us deliver great new features and capabilities in both Skype and Skype for Business." In January 2016, Skype announced it would roll out free group video calling to users on mobile devices, including i OS and Android.In February 2016, Microsoft announced that it had started to introduce group calling on smartphones and tablets in North America and Western Europe.Skype for Windows, On 12 September 2005, e Bay Inc.