Google Home doesn't really have an intercom feature like Alexa has. The feature on Google Home is more like a public address (PA) feature. Say, "OK Google, broadcast <message>" and Google records the message. It then replays the message on all Google Home devices (except smartphones). You can't even select which device to broadcast - it goes to all of them that are on the same WiFi network. People in the house can respond with their own broadcast, but again, it goes to all Home devices. I can initiate the broadcast from my smartphone while away from home, but it's one-way and no one can respond. They would have to call me. The broadcast feature on Google Home will be useful, but Alexa's Drop In is a much superior intercom.