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

Jean-Michaël Celerier jeanmichael.celerier at gmail.com
Fri Mar 27 16:45:55 CET 2020

> Answer to this is: No, it is not allowed to mix commercial "Licensed
Software" and the open-source versions provided by The Qt Company in the
same project.

What about open-source versions provided by another distributor, e.g.
someone doing apt install qtcreator ?

Also how is that compatible with this part of the Qt Creator license  ?


On Fri, Mar 27, 2020 at 4:24 PM Tuukka Turunen <tuukka.turunen at qt.io> wrote:

> Hi,
> This seems to become a longer thread than I envisioned, as apparently my
> original response was not clear enough.
> In general, if there are any questions or concerns related to licensing,
> check the FAQ: https://www.qt.io/faq/
> If you are looking for advise on licensing, I recommend either to read the
> FAQ or consult a lawyer. While everyone here tries their best to give good
> advice, it is possible that some incorrect information or interpretation is
> presented (because licensing can be a difficult topic).
> Anyways, I'll now explain again the answer to the original question asked.
> The question was, as I understood it, "Is it allowed that people working in
> a project use commercially licensed Qt and some other persons in the same
> project who do not develop Qt use open-source licensed Qt tools?"
> Answer to this is: No, it is not allowed to mix commercial "Licensed
> Software" and the open-source versions provided by The Qt Company in the
> same project.
> This is a restriction coming from the commercial license agreement:
> https://www.qt.io/terms-conditions/
> The basic rule of thumb is: Don't mix. Use either only commercial or only
> open-source versions of items provided by The Qt Company.
> Yours,
>         Tuukka
> On 27.3.2020, 16.26, "Interest on behalf of Giuseppe D'Angelo via
> Interest" <interest-bounces at qt-project.org on behalf of
> interest at qt-project.org> wrote:
>     On 27/03/2020 15:03, Tomas Konir wrote:
>     >
>     > Sorry for possible misunderstanding, but i think, that original
> question
>     > was little different.
>     > Question was:
>     >
>     > There is company, where are two developer groups:
>     > Group1: Use QtCreator and works with QT libraries (and works with
> other
>     > code which not use QT libraries). All users have Commercial License.
>     > Group2: Would like to use QtCreator and not use QT libraries (they
>     > working only with QT unrelated code). The want use QtCreator only as
>     >
>     > Can both groups use QtCreator?
>     > I thought, that using QtCreator as IDE is not conditioned with
> having QT
>     > Commercial license.
>     The only difference that comes to mind is that the first group can use
>     Qt Creator under its commercial license, which may come with some
> extra
>     features (not exactly sure of which ones, at this particular point in
> time).
>     The second group can instead just use Qt Creator under its open source
>     license. The open source license of Qt Creator itself does NOT extend
> in
>     any way to the software you develop (cf. the GPL FAQ).
>     HTH,
>     --
>     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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> Interest at qt-project.org
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