No. Diversity is not a "white label" service, so you cannot claim the software to be owned or development by yourselves. It's a Partnership between you and us, whether or not you tell your clients you're using Diversity is up to you, and certainly for smaller projects/sites, they may never need to know, but the whole Partnership relationship is to offer a better way of working on web projects that require input and at some point that may involve us in conversation with your client under your management.
At its basic level, we see it the same way as any designer using Wordpress, Drupal or any other CMS service, clients know you using our software but are using you to consult, design and manage it for them.
At its more complex level, unlike other services, we can customise the whole experience and offer a greater degree of individual development at the core level of the CMS than most other services. The ultimate aim is for you and your clients to know that that level of flexibility and growth exists using a Diversity package.