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Two editions of Qt are available under a commercial license: Qt GUI Framework Edition, and Qt Full Framework Edition.
You may write commercial, proprietary, or otherwise non-free software only if you have purchased a commercial edition of Qt. If you purchase a commercial edition, you are entitled to technical support and upgrades.
If you want to develop Free or Open Source software for release using a recognized Open Source license, you can use the Qt Open Source Edition.
The table below summarizes the differences between the three commercial editions:
(X) The Qt GUI Framework Edition contains selected classes from the QtGui and Qt3Support modules corresponding to the functionality available in the Qt 3 Professional Edition.
<X> The ActiveQt module is only available on Windows.
Lists of the classes available in each edition are available on the following pages:
Please see the list of supported platforms for up-to-date information about the various platforms and compilers that Qt supports.
On the Qt web site, you can find a Qt Licensing Overview and information on Qt License Pricing for commercial editions of Qt and other Qt-related products.
To purchase, please visit the online order form.
For further information and assistance, please contact Qt sales.
Email: [email protected].
Phone, U.S. office (for North America): 1-650-813-1676.
Phone, Norway office (for the rest of the world): +47 21 60 48 00.
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