This will be integrated with a WordPress theme.
The page builder will be based on columns that you can insert in a drag and drop environment and then in those columns, you can add other widgets and configure those widgets.
The widgets will be based on WordPress shortcodes and drag and drop needs to builder them in the backend and send them to the server in the end and the builder should also be able to read from them. Here's a video on the whole process.
Here is a short video on the potential workflow [url removed, login to view]