Skype 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.
SkypeSkypingSkypesSkype Previewskyped conference callSkype phoneSkype for WebSkype.comSkypeOutSkype laptop

Videotelephony

videoconferencingvideo conferencingvideo chat
Skype 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.
News media organizations have begun to use desktop technologies like Skype to provide higher-quality audio than the phone network, and video links at much lower cost than sending professional equipment or using a professional studio.

Tallinn

RevalRevelTallinn, Estonia
Skype division headquarters are in Luxembourg, but most of the development team and 44% of all the division's employees are still situated in Tallinn and Tartu, Estonia.
Often dubbed the Silicon Valley of Europe, it has the highest number of startups per person in Europe and is a birthplace of many international companies, including Skype.

Niklas Zennström

Niklas ZennstromZennström, Niklas
First released in August 2003, Skype was created by the Swede Niklas Zennström and the Dane Janus Friis, in cooperation with Ahti Heinla, Priit Kasesalu, and Jaan Tallinn, Estonians who developed the backend that was also used in the music-sharing application Kazaa.
Niklas Zennström (born 16 February 1966) is a Swedish billionaire entrepreneur best known for founding several high-profile online ventures with Janus Friis including Skype and Kazaa.

Silver Lake Partners

Silver LakeSilver Lake Kraftwerk
In September 2009, Silver Lake, Andreessen Horowitz, and the Canada Pension Plan Investment Board announced the acquisition of 65% of Skype for $1.9 billion from eBay, which attributed to the enterprise a market value of $2.92 billion.
Notable among its investment holdings are Broadcom, Dell, Alibaba, GoDaddy, William Morris Endeavor, IMG Worldwide, Avaya, Sabre Holdings, Skype, Symantec, GLG, Seagate Technology and NASDAQ.

Janus Friis

First released in August 2003, Skype was created by the Swede Niklas Zennström and the Dane Janus Friis, in cooperation with Ahti Heinla, Priit Kasesalu, and Jaan Tallinn, Estonians who developed the backend that was also used in the music-sharing application Kazaa.
Janus Friis (born 26 June 1976 in Copenhagen) is a Danish entrepreneur best known for co-founding the file-sharing application Kazaa, and the peer-to-peer telephony application Skype.

Skype Technologies

SkypeSkype Communications, S.à r.lSkype at Microsoft
On 10 May 2011, Microsoft Corporation acquired Skype Communications, S.à r.l for US$8.5 billion.
Skype Technologies S.A.R.L (also known as Skype Software S.A.R.L, Skype Communications S.A.R.L, Skype Inc., and Skype Limited) is a telecommunications company headquartered in Luxembourg City, Luxembourg and Palo Alto, CA, United States, whose chief business is the manufacturing 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 has since then operated as their wholly owned subsidiary; as of 2016, it is operating as part of Microsoft's Office Product Group.

Priit Kasesalu

First released in August 2003, Skype was created by the Swede Niklas Zennström and the Dane Janus Friis, in cooperation with Ahti Heinla, Priit Kasesalu, and Jaan Tallinn, Estonians who developed the backend that was also used in the music-sharing application Kazaa.
Priit Kasesalu (born 10 April 1972) is an Estonian programmer and software developer best known for his participation in the development of Kazaa, Skype and, most recently, Joost.

Kazaa

KaZaAKazaa Media Desktopfile sharing system
First released in August 2003, Skype was created by the Swede Niklas Zennström and the Dane Janus Friis, in cooperation with Ahti Heinla, Priit Kasesalu, and Jaan Tallinn, Estonians who developed the backend that was also used in the music-sharing application Kazaa.
Kazaa and FastTrack were originally created and developed by Estonian programmers from BlueMoon Interactive including Jaan Tallinn and sold to Swedish Niklas Zennström and Danish Janus Friis (who were later to create Skype and later still Joost and Rdio).

Jaan Tallinn

Bluemoon
First released in August 2003, Skype was created by the Swede Niklas Zennström and the Dane Janus Friis, in cooperation with Ahti Heinla, Priit Kasesalu, and Jaan Tallinn, Estonians who developed the backend that was also used in the music-sharing application Kazaa.
Jaan Tallinn (born 14 February 1972 in Tallinn ) is an Estonian programmer, investor, and physicist who participated in the development of Skype in 2002 and FastTrack/Kazaa, a file-sharing application, in 2000.

Webcam

webcamwebcamsweb camera
Skype allows users to communicate over the Internet by voice, using a microphone, by video using a webcam, and by instant messaging.
Webcam can be added to instant messaging, text chat services such as AOL Instant Messenger, and VoIP services such as Skype, one-to-one live video communication over the Internet has now reached millions of mainstream PC users worldwide.

EBay

eBayeBay.come-Bay
In September 2009, Silver Lake, Andreessen Horowitz, and the Canada Pension Plan Investment Board announced the acquisition of 65% of Skype for $1.9 billion from eBay, which attributed to the enterprise a market value of $2.92 billion. In September 2005, eBay acquired Skype for $2.6 billion.
In late 2009 eBay completed the sale of Skype for $2.75 billion, but still owned 30% equity in the company.

Microsoft Office 2013

Office 20132013Microsoft Office for Windows 2013
When the company introduced Office 2013 on 27 February 2013, it was announced that 60 Skype world minutes per month would be included in Office 365 consumer plans (Home and Personal, and University).
This version includes new features such as integration support for online services (including OneDrive, Outlook.com, Skype, Yammer and Flickr), improved format support for Office Open XML (OOXML), OpenDocument (ODF) and Portable Document Format (PDF) and support for multi-touch interfaces.

Skype for Business

LyncCommunicatorMicrosoft Office Communicator
On 11 November 2014, Microsoft announced that in 2015, Lync would be replaced by Skype for Business.
The latest version of the communication software combines features of Lync and of the consumer software Skype.

Windows Live Messenger

MSNMSN MessengerMessenger
Furthermore, Microsoft discontinued two of its own products in favor of Skype: In a month-long transition period from 8 to 30 April 2013, Microsoft phased out its long-standing Windows Live Messenger instant messaging service in favor of Skype, although Messenger continued in mainland China.
Following the acquisition of Skype Technologies in May 2011, Microsoft added interoperability between Skype and Microsoft accounts, allowing Skype (which had features unique to its platform and a wider user base) to communicate with Messenger contacts.

Ahti Heinla

First released in August 2003, Skype was created by the Swede Niklas Zennström and the Dane Janus Friis, in cooperation with Ahti Heinla, Priit Kasesalu, and Jaan Tallinn, Estonians who developed the backend that was also used in the music-sharing application Kazaa.
He is one of the developers of Skype.

Andreessen Horowitz

Andreessen-HorowitzAndreesen HorowitzAndreessen Horrowitz
In September 2009, Silver Lake, Andreessen Horowitz, and the Canada Pension Plan Investment Board announced the acquisition of 65% of Skype for $1.9 billion from eBay, which attributed to the enterprise a market value of $2.92 billion.
In 2009, Andreessen Horowitz made its two first investments: one in business management SaaS developer Apptio and the other in Skype stock.

3 Skypephone Series

3 Skypephone Series3 SkypephoneSkype’s Unlimited World
On 29 October 2007, Skype launched its own mobile phone under the brand name 3 Skypephone, which runs a BREW OS.
3 offered 4000 free Skype outbound voice minutes with the phones.

Skype protocol

Skype
Skype uses a proprietary Internet telephony (VoIP) network called the Skype protocol.
The Skype protocol is a proprietary Internet telephony network based on client-server architecture, used by Skype.

Windows Phone

WPWindowsWindows Phone
In 2012, Skype introduced a new version for Windows 8 similar to the Windows Phone version.
Windows 10 Mobile also features Skype messaging integration, updated Office Mobile apps, notification syncing with other Windows 10 devices, Microsoft Edge web browser, and other user interface improvements.

Voice over IP

VoIPvoice over IPvoice over Internet Protocol
Skype uses a proprietary Internet telephony (VoIP) network called the Skype protocol.
Second-generation providers, such as Skype, built closed networks for private user bases, offering the benefit of free calls and convenience while potentially charging for access to other communication networks, such as the PSTN.

Skype Qik

Qik
After shutting down Qik in April 2014, Skype relaunched the service as Skype Qik on 14 October 2014.
Skype Qik was a video messaging service by Skype.

Maemo

MaemoMaemo 5Internet Tablet OS 2008
Bundled applications include the Mozilla-based MicroB browser, Macromedia Flash player, Gizmo5, and Skype.

Office 365

Microsoft Office 365Office 365Office365
When the company introduced Office 2013 on 27 February 2013, it was announced that 60 Skype world minutes per month would be included in Office 365 consumer plans (Home and Personal, and University).
In lieu of Microsoft's enterprise software, Home plans for Office 365 include premium enhancements for Microsoft's consumer-level online services, including 1 terabyte of OneDrive storage for each user, along with 60 minutes of phone calls per month on the Microsoft-owned Skype VoIP service.

Windows 8

8Windows 8Windows 8.1
Along with taking over development of existing Skype desktop and mobile apps, the company developed a dedicated client app for its newly released, touch-focused Windows 8 and Windows RT operating systems.
Apps can also provide integration with other services; for example, the People app can connect to a variety of different social networks and services (such as Facebook, Skype, and People service), while the Photos app can aggregate photos from services such as Facebook and Flickr.

Tartu

DorpatDorpat (Tartu)Yuryev
Skype division headquarters are in Luxembourg, but most of the development team and 44% of all the division's employees are still situated in Tallinn and Tartu, Estonia.
Skype has an office in Tartu.