Google Nest Protect (Battery) vs X-Sense Wi-Fi Smoke Alarm

As a life-safety alarm the Google Nest Protect (Battery) is the better buy, because it detects both smoke and carbon monoxide, adds occupancy, temperature, humidity, light and motion sensing, tests itself, and carries a higher owner rating. The X-Sense Wi-Fi Smoke Alarm is smoke-only, but it counters with a 10-year battery rating and a 5-year warranty.

Hazard coverage is the headline gap. The Google Nest Protect (Battery) senses both smoke and carbon monoxide and adds self-test, a pathlight and Steam Check, while the X-Sense Wi-Fi Smoke Alarm detects smoke only and sends a straightforward WiFi phone alert, with no CO sensor at all.

The X-Sense Wi-Fi Smoke Alarm leads on both: its CR123A cell is rated for 10 years and it ships with a 5-year warranty. The Google Nest Protect (Battery) runs on 6 AA batteries rated for about 2 years and carries a 2-year warranty, trading longevity for far more sensing and smart features.

The Google Nest Protect (Battery) does, thanks to Google Home and Home Assistant support plus phone alerts you can act on from away. The X-Sense Wi-Fi Smoke Alarm connects only to its own app over 2.4GHz WiFi, with no Alexa, Google Home, HomeKit or Matter integration.

Buy the Google Nest Protect (Battery) if you want one unit covering both smoke and carbon monoxide, with spoken early warnings, phone alerts, self-testing and a pathlight, and you live in a Google or Nest household without hardwired alarm wiring.

Buy the X-Sense Wi-Fi Smoke Alarm if you only need smoke protection with phone alerts, want the longest battery rating and a 5-year warranty at a lower price, and do not care about carbon monoxide sensing or smart home platform integration.