A: Dear Sumo-ling,
Thanks for the question!
You can use Gravitec with any website that allows you to insert our code into header HTML template of your website or at least into the single page code. Best case scenario is also being able to place our SDK file into website's root directory.
Many site builders don't allow uploading SDK files to the root folder. In this case Gravitec will collect subscribers on a separate sub-domain, to work around the site builder restriction.
Anyway, the answer is — yes, you can. For best performance, check the possibility to upload SDK files into website's root folder.