I'm going to presume that this isn't available to anyone who has a Google Apps account, as that has been the trend of nearly all product launches by Google recently.

https://productforums.google.com/forum/#!topic/play/86WVa8b_...

Not available to Apps accounts:

* Google Family Library Sharing (Android apps sharing)

* Google Play Music Family Sharing (music collection sharing)

* Project Fi

* Google Spaces

* YouTube Red

* YouTube Music

Given that is most of the recent product launches, the chances of Duo and Allo being added to that list would appear to be very high.