As an whitelabel customer you'll need to setup a custom domain to host your software platform's Dashboard, which is branded to your own company.
My suggested setup is actually to use a subdomain, rather than a root domain - e.g. http://app.yourbrand.com This will allow you to use http://yourbrand.com as the sales page/website for your software. Please refer also to this article for a written walkthrough.
NOTE: The cloud should be grey, not orange as Mark mentioned in the video. (As a change is pending I didn't want to redo the video just to correct that minor error!)