Qt trademarks and most of the copyrights are fully owned and controlled by The Qt Company. The development work for Qt toolkit is done through the open source governed Qt project by The Qt Company R&D and external Qt contributors. The Qt project is an open ecosystem and infrastructure for developers and companies to contribute to Qt. All external contributions are licensed to the Qt company allowing re-licensing under both open source and commercial terms.

The Qt Company has a binding agreement with KDE Free Qt Foundation to ensure the availability of Qt under certain open source licenses for desktop and mobile platforms. The open source community and availability of Qt is an extremely important part of the whole value proposition of Qt, and something The Qt Company wants to commit to and drive forward.

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