Can I use the Open Source Edition to write commercial software?
Only if you plan to publish the software exclusively under the GPL.
If you plan to release a commercial product either using closed source or a mix of closed and open source licensing, you must use the commercially licensed version of Qt.
We offer a full evaluation version of Qt, including 30 days of support, to commercial evaluators. Using the evaluation version allows you to try out Qt commercially without any exposure to the GPL license. We also offer an evaluation version of Qt Script for Applications (QSA) on the same page. Please go to the Qt Evaluation Page to apply for it.
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