Qt Commercial Licensing

  • 1. What is a subscription license?

    Customers can purchase subscription licenses for various time periods, and are entitled to use the software during the agreed upon time period. The subscription payment includes software licenses, access to support services, and new versions of the software as they are released. When the subscription expires, the customer does not have access to use or distribute commercial software developed with Qt.

     

  • 2.01. Is there a difference between the commercial license bought online and the commercial license bought via a sales manager?

    The features and functionality and license are the same. The only difference are the payment options.

  • 2.10. Can I continue to distribute my application with my device after my license has expired?

    If you have unused Qt for Device Creation Distribution Licenses, you may continue distribute the application with your device for a period of 6 months. You are however not allowed to further develop or maintain the applications.

  • 2.11. My license has expired; can I continue to get new versions or updates if I do not renew the license?

    No. You must have an active license in order to get new versions/updates and receive support from The Qt Company.

  • 2.12. I have licenses for the whole development team; can I renew it only for some members of my team?

    All the developers that develop with Qt will need to have an active license. If the whole team develops with Qt, then they all need to have a valid license.

  • 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.

  • 2.14. How long is the start for free / evaluation period?
    The commercial evaluation term period varies depending on agreement with your account manager and is typically 10-30 days. During that time, you can develop with Qt, but you are not allowed to distribute your applications before you purchase a paid license. After the free trial period, you need to either purchase a license or cease from using the free trial.
  • 2.15. Do the Qt commercial licenses allow for easy publishing to the Apple App Store?

    Yes. The Qt commercial licenses allow publishing to the Apple AppStore or other stores (including those that require static linking).

  • 2.16. Which commercial Qt version grants rights to modify libraries?

    All commercially licensed Qt versions allow modification of Qt libraries.

    If you need technical support related to building Qt from source codes, at the minimum, Standard Support offered by The Qt Company is needed. Standard Support is included to our term licenses. If you need technical support for your modified Qt libraries, Premium Support offered by the Qt Company is required.

  • 2.17. Do the commercial Qt license agreements grant the right to do static linking of Qt libraries with applications?

    Yes.

  • 2.18. Can I distribute Qt binaries in conjunction with my desktop / mobile application?

    Yes. Distribution of Qt libraries in binary form in conjunction with the developed application is allowed under the Qt for Application Development license agreements. A separate agreement is not needed. The platforms for which you have the right to distribute are listed in your license certificate (in your Qt Account).

  • 2.19. Do I need to have a distribution license to distribute my Qt-based application?

    In order to distribute a Qt-based application on devices (joint software and hardware development involved) under the Qt commercial license, distribution licenses are also required. Please contact us to determine if you do require a distribution license.

  • 2.2. What is a term license?

    With a term license of Qt for Application Development or Qt for Device Creation, you pay a recurring fee during the time you develop with Qt and distribute the developed applications. You receive all updates and will be able to access online systems. After the term ends, you are no longer entitled to develop with Qt or further distribute the applications developed with Qt. Applications already distributed can be used, but not maintained.

  • 2.20. What does a ‘joint hardware and software distribution’ mean in practice?

    If you are making an embedded device with Qt, you most likely will have ‘joint hardware and software distribution’ as described in the Qt License Agreement. This is subject to a distribution fee, please contact us for more information.

  • 2.21. Does Qt commercial licensing allow for source code distribution of Qt libraries or tools?

    No, it does not. Qt libraries may be distributed in binary form only with the application.

  • 2.23. Under the Qt commercial licenses, can I add new functionality and distribute Qt Creator?

    No. Distribution of Qt Creator is prohibited without a separate agreement with The Qt Company.

  • 2.4. Do I have to purchase a commercial license for every Qt developer in our team?

    If you have chosen the commercial licensing, each Qt developer must have their own assigned Qt commercial license. It’s not permitted to mix Qt commercial licensees with Qt (L)GPL licensees in one project.

  • 2.5. Why and when do I need a license?

    The Qt Framework is dual-licensed under commercial and open-source licenses. The commercial Qt license gives you the full rights to create and distribute software on your own terms without any open source license obligations. The Qt open source licensing is ideal for use cases such as open-source projects with open source distribution, student/academic purposes, hobby projects, internal research projects without external distribution, or other projects where all (L)GPL obligations can be met.

  • 2.6. Can I install commercial Qt and tools to more than one of my computers?

    Yes. You can install Qt and our development tools on five devices per designated users. Our licenses are per individual, so all members of your project team using Qt need to have a commercial license.

  • 2.7. Can some developers in our team working on the same project use open-source version of Qt and some developers use Commercial version of Qt?
    No. Each developer must have their own assigned Qt license. Mixing Qt commercial licenses with Qt open-source licenses in one project/product is not permitted.
  • 2.8. Can I continue to use my commercial license after it has expired?

    If you are a legacy perpetual license holder, you can continue to use your Qt license if you choose not to renew your annual support & maintenance contract. Please note that you will not have access to support, bug releases, or patches. If you are a term or subscription license holder, your rights to continue using the tools, APIs and libraries expire when the term expires, or the subscription is canceled. You will not have the rights to future development or distribution.  

  • 2.9. Can I continue to distribute my application after my commercial license has expired?

    No. You are not permitted to further distribute your applications.

    If you have unused Qt for Device Creation Distribution Licenses, you may continue distribute the application with your device for a period of 6 months. You are however not allowed to further develop or maintain the applications.