1.2. What are the licensing options for Qt?

Starting from Qt 5.7, Qt is licensed under
• Commercial license
• LGPL3 open source license
• GPL2 or GPLv3 open source license

The general Qt toolkit, consisting of Qt Essential code libraries, the Qt add-on APIs, and the Qt Creator IDE are available dual-licensed for commercial and GPL licenses. Most of the Qt APIs are available also under LGPLv3 license but not all of the Qt Add-on modules.

In addition, the commercial Qt license includes additional tools and solutions for embedded development.