[Interest] Qt Creator licensing for companies with Qt Commercial developers

Giuseppe D'Angelo giuseppe.dangelo at kdab.com
Tue Mar 31 14:00:42 CEST 2020

On 3/31/20 1:22 PM, Tuukka Turunen wrote:
> For completely independent projects/products this is fine. Note that these really should not be same or in practice the same - or in any way depending, relating, using etc each other as defined in the license agreement.
> See licensing FAQ question 2.7 athttps://www.qt.io/faq/  and License agreement athttps://www.qt.io/terms-conditions/  

It is still unclear if the usage of Qt _Creator_ for developing some 
code would cause such code to fall under the restrictions of commercial 

Here's a few scenarios:

1) I have a Qt commercial license. In my project using commercial Qt I 
want to use a library developed by

1a) some other team in my company;
1b) someone else.

This other library is under a liberal license; does NOT use Qt itself in 
any way; but has been developed using Qt Creator (GPL). Can I use it in 
my product under the commercial license? Or would it fall under the 
"Prohibited Combination":

> “Prohibited Combination” shall mean any means to (i) use, combine, incorporate, link or integrate Licensed Software with any software created with or incorporating Open Source Qt, (ii) use Licensed Software for creation of any software created with or incorporating Open Source Qt

Does "created with" here extend to GPL Creator?

2) Same as 1, but this time with the library using Qt (as in: using 
headers, linking against it). Example: a Qt-based library coming from 
KDE Frameworks, developed using Creator.

Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
KDAB (France) S.A.S., a KDAB Group company
Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
KDAB - The Qt, C++ and OpenGL Experts

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