Google Nest Protect (Wired) vs Shelly Plus Smoke Alarm

Data from Amazon and official Google and Shelly sites.

2026 verdict

Looking at the full picture in 2026, Google Nest Protect (Wired) gets the edge. 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.

Winner

Google

Google Nest Protect (Wired)

15% OFF

$149.00

$126.65

BUY NOW

Shelly

Shelly Plus Smoke Alarm

25% OFF

€53.43

€39.95

BUY NOW

Feature	Google Nest Protect (Wired)	Shelly Plus Smoke Alarm	Winner
Price	$126.65	€39.95	Shelly Plus Smoke Alarm
Rating	4.5	4.3	Google Nest Protect (Wired)
Warranty	2 years	3 years	Shelly Plus Smoke Alarm
Integrations	Google Home, Home Assistant	Google Home, Alexa, Samsung SmartThings, Home Assistant	Shelly Plus Smoke Alarm
Sensors	Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion	Smoke	Google Nest Protect (Wired)
Alerts	Fire Alerts, CO Alerts, Low Battery Alerts	Fire Alerts, Low Battery Alerts	Google Nest Protect (Wired)
Tests Itself	YES	NO	Google Nest Protect (Wired)
Pathlight	YES	NO	Google Nest Protect (Wired)
Steam Check	YES	NO	Google Nest Protect (Wired)
Connectivity	2.4 GHz Wifi, Bluetooth	2.4 GHz Wifi, Bluetooth	Tie
Screen	NO	NO	Tie
Built-in Siren	YES	YES	Tie

Winner

Google

Google Nest Protect (Wired)

15% OFF

$149.00

$126.65

BUY NOW

+ Rating: 4.5
+ Sensors: Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion
+ Alerts: Fire Alerts, CO Alerts, Low Battery Alerts
- Price: $126.65 vs €39.95
- Warranty: 2 years vs 3 years

Shelly

Shelly Plus Smoke Alarm

25% OFF

€53.43

€39.95

BUY NOW

+ Price: €39.95
+ Warranty: 3 years
+ Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant
- Rating: 4.3 vs 4.5
- Sensors: Smoke vs Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion

Frequently Asked Questions (FAQ)

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 $126.65, while Shelly Plus Smoke Alarm lists €39.95.
Which one looks better on price?: Google Nest Protect (Wired) is listed at $126.65, 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.