“Our goal is to be the first smart smoke detector on Matter in the U.S.,” he said. A couple of new smart smoke alarms have launched in the wake of the end of Nest Protect. The hardwired Kidde Smart Smoke Alarm with Ring ($54.97) and the Kidde Smart Smoke and CO Alarm with Ring ($74.97), which work with the Ring app to send you alerts. First Alert (now owned by Resideo) partnered with Google on the $129 First Alert Smart Smoke & CO detector. With a hardwired alarm and battery-powered option, these smart alarms work with Google Home and can integrate with existing Google Nest Protect alarms, interconnecting over Google’s Thread and Weave protocols.