[Interest] Mixing Commercial and Open Source license for different projects

[Tuukka Turunen]

Hi James,

You asked if it is allowed for a developer who has purchased commercial license of Qt for project A to work on project B using open-source license of Qt. Assuming that these projects are separate (independent and not related to each other in any way), this is possible. The reason for limitation of mixing open-source and commercial versions is indented to prevent some person(s) who do not have a commercial license to use open-source version of Qt for work benefitting the commercially licensed software. This is not the case in the situation you described as long as these projects really are separate (not just paid by different companies).

Yours,

                Tuukka

From: Interest <interest-bounces at qt-project.org> on behalf of James Maxwell <maxwell130631 at gmail.com>
Date: Sunday, 14. March 2021 at 16.32
To: interest at qt-project.org <interest at qt-project.org>
Subject: [Interest] Mixing Commercial and Open Source license for different projects
Hi,

I am confused by the requirement of not mixing licenses, see the discussion in this thread:
https://lists.qt-project.org/pipermail/interest/2020-March/034737.html

The situation is as follows: I am an independent software developer. If my customer A wants to use a commercial license and my customer B wants to use the GPL orLGPL license, can I still develop software for both?
For A I need a commercial license. Am I then still allowed to use QtCreator under my commercial license to develop a LGPL project for customer B?

Best regards,
James
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20210316/7724b461/attachment.html>