Google Nest Protect (Battery) vs Shelly Plus Smoke Alarm

Data from Amazon and official Google and Shelly sites.

2026 verdict

Taken as a whole in 2026, Google Nest Protect (Battery) wins this matchup. It separates itself most clearly on sensors, alerts, and tests itself, while still looking better on pathlight and steam check. The only strong reason to choose Shelly Plus Smoke Alarm is if price, warranty, and integrations is more important to you than the overall verdict. Overall, Google Nest Protect (Battery) makes more sense for most people.

Winner

Google

Google Nest Protect (Battery)

$158.29

BUY NOW

Shelly

Shelly Plus Smoke Alarm

25% OFF

€53.43

€39.95

BUY NOW

Feature	Google Nest Protect (Battery)	Shelly Plus Smoke Alarm	Winner
Price	$158.29	€39.95	Shelly Plus Smoke Alarm
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 (Battery)
Alerts	Fire Alerts, CO Alerts, Low Battery Alerts	Fire Alerts, Low Battery Alerts	Google Nest Protect (Battery)
Tests Itself	YES	NO	Google Nest Protect (Battery)
Pathlight	YES	NO	Google Nest Protect (Battery)
Steam Check	YES	NO	Google Nest Protect (Battery)
Rating	4.3	4.3	Tie
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 (Battery)

$158.29

BUY NOW

+ Sensors: Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion
+ Alerts: Fire Alerts, CO Alerts, Low Battery Alerts
+ Tests Itself: YES
- Price: $158.29 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
- Sensors: Smoke vs Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion
- Alerts: Fire Alerts, Low Battery Alerts vs Fire Alerts, CO Alerts, Low Battery Alerts

Frequently Asked Questions (FAQ)

Which is better overall: Google Nest Protect (Battery) or Shelly Plus Smoke Alarm?: Google Nest Protect (Battery) has the stronger overall profile in this comparison, especially for sensors, alerts, and tests itself.
What is the biggest difference between Google Nest Protect (Battery) and Shelly Plus Smoke Alarm?: Price is one of the clearest differences: Google Nest Protect (Battery) lists $158.29, while Shelly Plus Smoke Alarm lists €39.95.
Which one looks better on price?: Google Nest Protect (Battery) is listed at $158.29, while Shelly Plus Smoke Alarm is listed at €39.95. Shelly Plus Smoke Alarm (better spec).
Who should buy Google Nest Protect (Battery)?: Choose Google Nest Protect (Battery) if your priority is sensors and alerts 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 sensors.