Aqara Smart Smoke Detector vs Google Nest Protect (Wired)

The Google Nest Protect (Wired) is better overall as a life-safety device, detecting both smoke and carbon monoxide, adding a broad sensor suite and self-test, and running on mains power with a battery backup, plus a higher owner rating and longer warranty. The Aqara Smart Smoke Detector wins on price and on HomeKit, Home Assistant and Matter integration, but it senses smoke only.

Power and hazard coverage separate them most. The Google Nest Protect (Wired) is a hardwired smoke-and-CO alarm with a full sensor suite and self-testing, while the Aqara Smart Smoke Detector is a battery-powered, smoke-only Zigbee sensor that needs a hub and focuses on HomeKit, Home Assistant, IFTTT and Matter automations.

No. The Aqara Smart Smoke Detector is battery-powered and runs on a CR17450 cell with no wiring, but it does require a Zigbee hub to work as a smart device. The Google Nest Protect (Wired) connects to 120V house wiring with a 3 AA battery backup, so it suits homes that already have alarm wiring.

The Google Nest Protect (Wired) offers far more, adding carbon monoxide, occupancy, temperature, humidity, ambient-light and motion sensors plus CO and low-battery alerts, steam-check, self-test and a pathlight. The Aqara Smart Smoke Detector focuses on smoke detection with a built-in color LED and fire alerts.

Buy the Google Nest Protect (Wired) if your home has hardwired alarm wiring, you want combined smoke and CO detection with spoken early warnings and self-testing, and you would rather never handle routine battery changes in a Google or Nest household.

Buy the Aqara Smart Smoke Detector if you want the more affordable, battery-powered option, already run a Zigbee, Apple HomeKit or Matter setup, and want smoke detection tied into automations rather than a hardwired combined smoke-and-CO alarm.