Shelly Plus Smoke Alarm vs X-Sense Wi-Fi Smoke Alarm comparison

Data from Amazon and official Shelly and X-Sense sites.

2026 verdict

For a device that has to sit on a ceiling and simply keep working, the X-Sense Wi-Fi Smoke Alarm is the better buy over the Shelly Plus Smoke Alarm: its battery is rated at 10 years against 5, its warranty runs 5 years against 3, and it holds a marginally stronger owner rating. A sealed decade-long battery means no chirping at three in the morning and no ladder trips, which is most of what people want from a smoke alarm. The Shelly Plus Smoke Alarm is the one to choose if the alarm has to do more than sound: it works with Google Home, Alexa, Samsung SmartThings and Home Assistant, where the X-Sense lists no integrations at all, and it adds Bluetooth alongside Wi-Fi. That is what lets a smoke event switch on lights, unlock a door or trigger a wider automation. Choose the Shelly Plus Smoke Alarm for smart-home integration, and the X-Sense Wi-Fi Smoke Alarm for the longest battery and warranty with the least maintenance.

Shelly

Shelly Plus Smoke Alarm

25% OFF

€39.95

€53.43

Buy on Amazon Germany

Winner

X-Sense

X-Sense Wi-Fi Smoke Alarm

Price unavailable right now

Buy on Amazon UK

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Feature	Shelly Plus Smoke Alarm	X-Sense Wi-Fi Smoke Alarm	Winner
Rating	4.4	4.5	X-Sense Wi-Fi Smoke Alarm
Warranty	3 years	5 years	X-Sense Wi-Fi Smoke Alarm
Battery Life	5 years	10 years	X-Sense Wi-Fi Smoke Alarm
Connectivity	2.4 GHz WiFi, Bluetooth	2.4 GHz WiFi	Shelly Plus Smoke Alarm
Integrations	Google Home, Alexa, Samsung SmartThings, Home Assistant	Home Assistant	Shelly Plus Smoke Alarm
Screen	NO	NO	Tie
Sensors	Smoke	Smoke	Tie
Alerts	Fire Alerts, Low Battery Alerts	Fire Alerts, Low Battery Alerts	Tie
Built-in Siren	YES	YES	Tie
Built-in Light	YES	YES	Tie
Tests Itself	NO	NO	Tie
Pathlight	NO	NO	Tie

Shelly

Shelly Plus Smoke Alarm

25% OFF

€39.95

€53.43

Buy on Amazon Germany

+ Connectivity: 2.4 GHz WiFi, Bluetooth
+ Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant
- Rating: 4.4 vs 4.5
- Warranty: 3 years vs 5 years

Winner

X-Sense

X-Sense Wi-Fi Smoke Alarm

Price unavailable right now

Buy on Amazon UK

+ Rating: 4.5
+ Warranty: 5 years
+ Battery Life: 10 years
- Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, Bluetooth
- Integrations: Home Assistant vs Google Home, Alexa, Samsung SmartThings, Home Assistant

Frequently Asked Questions

Which is better overall: Shelly Plus Smoke Alarm or X-Sense Wi-Fi Smoke Alarm?

The X-Sense Wi-Fi Smoke Alarm, with a 10 year battery against 5, a 5 year warranty against 3 and a slightly better rating. The Shelly Plus Smoke Alarm wins on integrations, covering Google Home, Alexa, SmartThings and Home Assistant.

Which one lasts longer without maintenance?

The X-Sense Wi-Fi Smoke Alarm, rated at 10 years of battery life against 5 for the Shelly Plus Smoke Alarm, so it can be fitted and largely forgotten for a decade.

Which one integrates with a smart home?

The Shelly Plus Smoke Alarm, which works with Google Home, Alexa, Samsung SmartThings and Home Assistant. The X-Sense Wi-Fi Smoke Alarm lists no integrations and alerts through its own app.

Which one has the longer warranty?

The X-Sense Wi-Fi Smoke Alarm, at 5 years against 3 years for the Shelly Plus Smoke Alarm.

Are both smoke-only alarms?

Yes, both detect smoke rather than carbon monoxide. If you have fuel-burning appliances, you need a separate CO alarm alongside either of these.

Who should buy the Shelly Plus Smoke Alarm?

Buyers who want fire detection wired into automations through Home Assistant, SmartThings, Google Home or Alexa, and who accept a shorter battery and warranty.

Who should buy the X-Sense Wi-Fi Smoke Alarm?

Buyers who want a reliable, well-rated alarm with a 10 year battery and 5 year warranty, and who do not need it to talk to the rest of the house.

Full comparison table

Compare all 18 Smoke & CO Detectors side by side

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