Smoke & CO Detectors · Head to head

Google Nest Protect (Wired) vs Shelly Plus Smoke Alarm

Full Smart Smoke & CO Detectors comparison in 2026

Updated July 2026
Data from Amazon and official Google and Shelly sites.
2026 verdict
Google Nest Protect (Wired) edges out Shelly Plus Smoke Alarm in 2026, led by rating, sensors, and alerts. It builds its lead on rating, sensors, and alerts, then backs it up with a stronger showing on tests itself and pathlight. There is still a case for Shelly Plus Smoke Alarm, but mainly if price, warranty, and integrations is what you value most. Overall, Google Nest Protect (Wired) makes more sense for most people.
vs
FeatureGoogle Nest Protect (Wired)Shelly Plus Smoke AlarmWinner
Price$399.99€39.95Shelly Plus Smoke Alarm
Rating4.64.4Google Nest Protect (Wired)
Warranty2 years3 yearsShelly Plus Smoke Alarm
IntegrationsGoogle Home, Home AssistantGoogle Home, Alexa, Samsung SmartThings, Home AssistantShelly Plus Smoke Alarm
SensorsSmoke, CO, Occupancy, Temperature, Humidity, Ambient Light, MotionSmokeGoogle Nest Protect (Wired)
AlertsFire Alerts, CO Alerts, Low Battery AlertsFire Alerts, Low Battery AlertsGoogle Nest Protect (Wired)
Tests ItselfYESNOGoogle Nest Protect (Wired)
PathlightYESNOGoogle Nest Protect (Wired)
Steam CheckYESNOGoogle Nest Protect (Wired)
Connectivity2.4 GHz WiFi, Bluetooth2.4 GHz WiFi, BluetoothTie
ScreenNONOTie
Built-in SirenYESYESTie

Frequently Asked Questions

Which is better overall: Google Nest Protect (Wired) or Shelly Plus Smoke Alarm?

Google Nest Protect (Wired) has the stronger overall profile in this comparison, especially for rating, sensors, and alerts.

What is the biggest difference between Google Nest Protect (Wired) and Shelly Plus Smoke Alarm?

Price is one of the clearest differences: Google Nest Protect (Wired) lists $399.99, while Shelly Plus Smoke Alarm lists €39.95.

Which one looks better on price?

Google Nest Protect (Wired) is listed at $399.99, while Shelly Plus Smoke Alarm is listed at €39.95. Shelly Plus Smoke Alarm (better spec).

Who should buy Google Nest Protect (Wired)?

Choose Google Nest Protect (Wired) if your priority is rating and sensors and that matters more than price.

Who should buy Shelly Plus Smoke Alarm?

Choose Shelly Plus Smoke Alarm if your priority is price and warranty and that matters more than rating.

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