Google now recommends the First Alert SC5 as the primary alternative.

If you are looking to purchase one at , here is what you need to know about its current availability, features, and its official successor. Current Availability & Replacement

The SC5 is designed to be a "seamless transition," using the same mounting bracket as the Nest Protect and integrating directly into the Google Home app. Why the Nest Protect Was (and Is) a Top Choice Nest Protect Go to product viewer dialog for this item.