While Home is positioned as a way to add Assistant to your domicile, it's only fully usable for a single person. You cannot have more than one account tied to Google Home, so all the user-specific data accessible on Home belongs to whoever sets it up. The only option here is to disable "personal results" so other people can't get into things like your calendar. It should be able to figure out who's who, though. Google is able to recognize voices--you train your phone's OK Google trigger so only you can set it off.

The Pixel smartphones and the Google Home are amazing new Google devices. But they're not the best thing Google unveiled on stage during Tuesday's media event. You won't be able to buy it in a store by itself. It will come prepackaged in Pixels, Homes and other smart devices Google launches in the future. It's the Google Assistant, the intelligent, voice-activated AI-powered computer that can respond to intricate queries, and predict what you're going to need next.