“In the latter case, the rational is (I guess) to prevent a company, say, to
work with 20 developers for 3 years on an OSS Qt license, then switch to
commercial when it's time to ship the product and the team is reduced to a core
maintenance crew. That late switch is unfair to companies that are playing by
the rule, but it's probably hard to police for the Qt company.”
Yes, exactly.
Same reasoning behind the “no mixing of items developed with commercial and
open-source licenses of Qt”. If that was allowed a company with 10 developers
would have only 1 license to access support for all of the team’s problems and
to get accelerated bug fixes – and of course to ship with.
Yours,
Tuukka
From: Interest <interest-boun...@qt-project.org> on behalf of Ilya Diallo
<ilya.dia...@gmail.com>
Date: Tuesday, 8 October 2019 at 20.16
To: Melinda Seifert <melinda.seif...@qt.io>
Cc: Uwe Rathmann <uwe.rathm...@tigertal.de>, "interest@qt-project.org"
<interest@qt-project.org>
Subject: Re: [Interest] Licensing
It would maybe be useful to clarify what his mistake is ?
From what I understand Uwe mixes "contributing to open source project" and
"using open source Qt for a closed project". In the former case, of course he's
welcome to buy commercial licences for whatever project he'll be working on. In
the latter case, the rational is (I guess) to prevent a company, say, to work
with 20 developers for 3 years on an OSS Qt license, then switch to commercial
when it's time to ship the product and the team is reduced to a core
maintenance crew. That late switch is unfair to companies that are playing by
the rule, but it's probably hard to police for the Qt company.
Best regards
Ilya
Le mar. 8 oct. 2019 à 15:30, Melinda Seifert
<melinda.seif...@qt.io<mailto:melinda.seif...@qt.io>> a écrit :
Uwe,
You are completely mistaken! I'm more than happy to discuss this with you. My
phone number is listed below. In the meantime please view https://www.qt.io/faq/
2.13. If I have started development of a project using the open source version
(LGPL), can I later purchase a commercial version of Qt and move my code under
that license?
"This is not permitted without written consent from The Qt Company. If you have
already started the development with an open-source version of Qt, please
contact The Qt Company to resolve the issue. If you are unsure of which license
or version to use when you start development, we recommend you contact The Qt
Company to advise you on the best choice based on your development needs."
Best Regards,
Melinda Seifert
Regional Director of the Americas
The Qt Company
O: 617-377-7918 | M: 617-413-4479
Qt Customer Case Studies - https://resources.qt.io/customer-stories-all
On 10/8/19, 3:54 AM, "Interest on behalf of Uwe Rathmann"
<interest-boun...@qt-project.org<mailto:interest-boun...@qt-project.org> on
behalf of uwe.rathm...@tigertal.de<mailto:uwe.rathm...@tigertal.de>> wrote:
On 10/8/19 1:21 AM, Melinda Seifert wrote:
> You can use commercial if you previously used Open Source but it’s on
> a case by case basis and you need to get approval from the Qt
> company.
Like you need to get approval from the Qt company when not having been
Open Source before - it is the basic right of any seller not to sell.
But your statement implies, that the Qt Company is blacklisting users
because of contributing to Open Source projects. Am I already
blacklisted because of offering code under an Open Source license ?
How does this all fit to the Qt project, that is in parts based on
contributions from Open Source developers. Am I invited to contribute to
the code base, while not being allowed to buy my own contribution
afterwards ?
Uwe
_______________________________________________
Interest mailing list
Interest@qt-project.org<mailto:Interest@qt-project.org>
https://lists.qt-project.org/listinfo/interest
_______________________________________________
Interest mailing list
Interest@qt-project.org<mailto:Interest@qt-project.org>
https://lists.qt-project.org/listinfo/interest
_______________________________________________
Interest mailing list
Interest@qt-project.org
https://lists.qt-project.org/listinfo/interest
