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

[Tuukka Turunen]

Hi,

This clarification is related to independent open-source software. For example an independent open-source application containing Qt like https://wiki.wireshark.org/Development/QtShark or independent open-source library created using Qt such as https://inqlude.org/libraries/vlc-qt.html. If the software you want to use meets the terms defined, then it is ok. Note specifically that open-source Qt (including also tools) is not allowed to be mixed with commercially licensed Qt.

Yours,

                Tuukka

From: Ramakanth Kesireddy <rama.kesi at gmail.com>
Date: Monday 11. May 2020 at 16.52
To: Tuukka Turunen <tuukka.turunen at qt.io>
Cc: Bernhard Lindner <private at bernhard-lindner.de>, Qt Interest <interest at qt-project.org>
Subject: Re: [Interest] Qt Creator licensing for companies with Qt Commercial developers

Hi Tuukka,


Does it mean that if we use Qt 5.12.8 LTS commercial license, it is permitted to use Open source components like third party Qt WebKit  module in conjunction with commercial license?

Could you please let me know in this regard?

Thanks and Regards,
Ramakanth
On Mon, 11 May, 2020, 18:01 Tuukka Turunen, <tuukka.turunen at qt.io<mailto:tuukka.turunen at qt.io>> wrote:
Hi,

We have now clarified the license agreement to allow use of independent open-source items in conjunction with commercially license Qt.

The updated agreement (version 4.2.3) states:

"Permitted Software" shall mean any (i) open source software (excluding Open Source Qt) that is a) generally available for public in source code form without additional cost under any of the licenses approved by Open Source Initiative as listed on  https://opensource.org/licenses; and (b) is in no way, directly or indirectly, developed by or for or otherwise related to or in the interest of the Licensee or its Affiliates, or (ii) software The Qt Company has made available via its Qt Marketplace online distribution channel.

Updated agreement can be found from https://www.qt.io/terms-conditions as well as from the Qt online installer.

This clarification should clear the usage of independent open-source tools and libraries containing or developed with Qt. Mixing of open-source Qt framework and tools with commercially licensed Qt remains forbidden, just like before.

Yours,

        Tuukka

On 2.4.2020, 21.17, "Bernhard Lindner" <private at bernhard-lindner.de<mailto:private at bernhard-lindner.de>> wrote:

    Hi Tuukaa!

    > TTT: This part is difficult to generally answer, as it depends how these are used and
    > what these are used for. Intention of the mixing restriction is to prevent cases where
    > someone (e.g. a company) uses the open-source version of Qt in cases where they should
    > use commercial version. Typical example of this is a case where only part of the
    > developers using Qt together would have a commercial license. We are aware of the fact
    > that the way how it is written is such that it might extend further than the primary
    > intention. This is a topic that we do not currently have a proper solution for.

    Then you should find a solution. This puts customers / developers / users in the situation
    that they depend on the goodwill of a for-profit corporation. However, there is no good
    will in a profit-making business.

    It must be perfectly clear that development projects are not affected by the fundamental
    use of third-party Qt-based applications.

    I probably will not use Qt for new projects and I cannot recommend it (but I have to add
    that this decision is also driven by the fact that the technical priorities in the Qt
    project have not been in line with my priorities for a few years) .

    --
    Best Regards,
    Bernhard Lindner

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