The Qt Company

The Qt Company (pronounced "cute"; formerly Trolltech) is a software company based in Espoo, Finland. It oversees the development of its Qt application framework within the Qt Project. It was formed following the acquisition of Qt by Digia, but was later spun off into a separate, publicly traded company.

Qt Group plc
Traded asNasdaq Helsinki: QTCOM
IndustryComputer software
Founded4 March 1994 (as Trolltech)
  • Eirik Chambe-Eng
  • Haavard Nord
Area served
Key people
  • Juha Varelius (CEO)
  • Mika Harjuaho (CFO)
  • Lars Knoll (CTO)
ProductsQt, Qt Creator, Qbs, PySide
Revenue€45.6 million (2018)[4]
-€2.3 million (2018)[4]
Number of employees
295 (on average in 2018)[4]

It has core R&D in Oslo, Norway, as well as large engineering teams in Berlin, Germany and Oulu, Finland. The Qt Company operates in China, Finland, Germany, Norway, Russia, South Korea, Japan, India, and the United States.[2]


The company provides software development platforms and frameworks, as well as expert consulting services. Its flagship product is Qt, a multi-platform Graphical User Interface (GUI) framework written in C++. Qt is popular with application developers using C++ but is supported by bindings for other programming languages too, such as Python. Qt also includes packages such as data structures and a networking library. The popular, Free, and cross-platform KDE Plasma desktop environment and software compilation uses the Qt library. The company also employs several KDE developers.

In 2001 Trolltech introduced Qtopia which is based on Qt. Qtopia is an application platform for Linux-based devices such as mobile phones, portable media players, and home media. It is also used in many non-consumer products such as medical instruments and industrial devices. Qtopia Phone Edition was released in 2004, and their Greenphone smartphone is based on this platform.


Trolltech was founded by Eirik Chambe-Eng and Haavard Nord on 4 March 1994. They started writing Qt in 1991, and since then Qt has steadily expanded and improved. Trolltech completed an initial public offering (IPO) on the Oslo Stock Exchange in July, 2006.

On 28 January 2008, Nokia Corporation announced that they had entered into an agreement that Nokia would make a public voluntary tender offer to acquire Trolltech.[5] The total cost for Nokia was approximately €104 million.[6][7] On 5 June 2008 Nokia's voluntary tender offer was approved for all the shares in Trolltech. By 17 June 2008, Nokia had completed its acquisition of Trolltech. On 30 September 2008, Trolltech was renamed as Qt Software, and Qtopia was renamed as Qt Extended. On 11 August 2009, the company's name was changed to Qt Development Frameworks.[8]

Nokia sold the commercial licensing business of Qt to Digia on March 2011.[9] The remainder of the assets were subsequently acquired by Digia in 2012.

In September 2014, Digia formed The Qt Company, a wholly owned subsidiary dedicated to the development and governance of the Qt platform.[10] In May 2016, the company went public on NASDAQ Helsinki as QTCOM.[11]


  1. "20 Years of Qt Code". Retrieved 10 June 2016.
  2. "Office Locations". Retrieved 15 July 2018.
  3. "The Qt Company Management". Retrieved 10 June 2016.
  4. "Financials - Qt for Investors". Retrieved 8 April 2019.
  5. "Nokia to acquire Trolltech to accelerate software strategy". 28 January 2008. Retrieved 28 January 2008.
  6. "Nokia ostaa norjalaisen ohjelmistoyrityksen" (in Finnish). 28 January 2008. Archived from the original on 29 January 2008. Retrieved 28 January 2008.
  7. "Nokia to buy Trolltech, will become a patron of KDE".
  8. "New name, new domain announced for Qt Development Frameworks". 11 August 2009. Archived from the original on 7 January 2012. Retrieved 18 August 2009.
  9. Lawton, Christopher (7 March 2011). "Nokia to Sell Qt Business". Wall Street Journal.
  10. "Qt hot potato spun out from Digia into fourth home". ZDNet. Retrieved 21 February 2017.
  11. "NASDAQ Helsinki Welcomes Qt Group Plc". Qt Group. 4 May 2016. Retrieved 10 June 2016.
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