Support your strategic objectives with the Qt Framework. Discover licensing options matching your project needs.
Qt Framework is available under both commercial and open source licenses providing various benefits. There are two commercial packages available for software development with Qt which differ in targeted platforms: Qt for Application Development and Qt for Device Creation. Each package is available in two variants providing a different sets of additional functionalities: Professional and Enterprise.
Qt for Application Development, like most of popular technologies and programming languages, is also available under the open source GNU Lesser General Public License (LGPLv3). This licensing option can be used for commercial projects where all of the open-source license obligations can be met.
|Qt for Application Development - Open Source LGPL||Qt for Application Development - Professional & Enterprise||Qt for Device Creation - Professional & Enterprise|
|Qt Essentials - Core, QML, Widgets and more|
|Qt Add-Ons||✳️ (Selection of addons)|
|M2M Protocols modules||-||✳️ (Enterprise variant only)|
|Automotive development||-||-||✳️ (Selection of addons)|
Qt Framework, with selection of modules and addons, is also available under GPL license. In most cases such a license is used for development of open-source software which uses only GPL licensed libraries and is distributed under the same license.
Licenses used for distribution of open source software come with various obligations. One of the commonly used licenses is GNU Lesser General Public License (LGPL). All of the Qt Essentials modules are available under such a license and can be used to develop both commercial software and open-source projects. Take a look at short overview of key LGPL obligations which you need to meet in order to make your project LGPL compliant.
Source code of Qt used in the project, or instructions on how to get the source code, need to be distributed with project. If Qt source code was modified changes needs to be published too.
Qt is linked dynamically or whole project source code is distributed under LGPL license if the Qt is linked statically.
User needs to be allowed to re-link or modify Qt LGPL linked libraries.
Information that Qt LGPL library is used need to be put in the application.
Copy of LGPL License is distributed with application.
Terms of usage for product are not restricting any parts of the LGPL license.
Application is distributed via channels which policies are LGPL compliant.
Full list of obligations and more information about LGPL available in following sources:
As Qt Service Partner, Scythe Studio supports clients with selection of right license and purchase process. Get in touch with us right away for expert assistance in choosing the best choice for your project's requirements.Get Qt license
Access to dedicated modules with a variety of ready-made solutions.
No need to worry about open source obligations.
All of the modules licenses are compatible with each other.
You can distribute software on your own terms.
Extended support for LTS versions.
When selecting your licensing option it is crucial to consider the benefits of commercial licenses. Selection of the right licensing option can lower your time-to-market and make your product more reliable by ensuring long term support and license compatibility.
Distributing software which does not meet LGPL requirements.
Distributing devices with embedded software using Qt.
Developing commercial apps needing access to Qt implementation of M2M protocols like MQTT or CoAP.
Using commercial-only modules like Boot to Qt.
Making the right choice can be hard. Here are a few common cases in which commercial license would be needed for your project. In case where you cannot match your project to any of the cases feel free to reach out using contact form below.
Feel free to reach us. Scythe Studio team will write back immediately.