Free extensions seem to be allowed. Check this one for example: https://marketplace.qt.io/products/incredibuild https://marketplace.qt.io/products/incredibuild

Free extensions seem to be allowed. Check this one for example: https://marketplace.qt.io/products/incredibuild https://marketplace.qt.io/products/incredibuild Obviously it needs Incredibuild server and license, but the plugin is distributed via Qt Marketplace free of charge.