Smoke & CO Detectors · Head to head

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

Full Smart Smoke & CO Detectors comparison in 2026

Data from Amazon and official Shelly and X-Sense sites.
2026 verdict
Two smoke-only detectors, and the longer service life tilts it: the X-Sense Wi-Fi Smoke Alarm outlasts the Shelly Plus Smoke Alarm with a ten-year cell against five, and backs the unit with a five-year warranty rather than three.
X-Sense Wi-Fi Smoke Alarm
Winner
X-Sense Wi-Fi Smoke Alarm
€24.06

Last recorded price

Buy on Amazon Italy
Both connect straight to 2.4GHz Wi-Fi without a hub and send phone alerts, but the Shelly Plus Smoke Alarm is the one that joins a smart home properly, adding Google Home, Samsung SmartThings, Home Assistant and MQTT so a smoke event can trigger lights and routines. Neither detects carbon monoxide. Choose the X-Sense Wi-Fi Smoke Alarm for the longest battery and warranty in a simple room alarm, and the Shelly Plus Smoke Alarm when the alarm has to do something else in your automation system.
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FeatureShelly Plus Smoke AlarmX-Sense Wi-Fi Smoke AlarmWinner
Price€52.54€24.06X-Sense Wi-Fi Smoke Alarm
Warranty3 years5 yearsX-Sense Wi-Fi Smoke Alarm
Battery Life5 years10 yearsX-Sense Wi-Fi Smoke Alarm
Connectivity2.4 GHz WiFi, Bluetooth2.4 GHz WiFiShelly Plus Smoke Alarm
IntegrationsGoogle Home, Samsung SmartThings, Home AssistantHome AssistantShelly Plus Smoke Alarm
Rating4.34.3Tie
ScreenNONOTie
SensorsSmokeSmokeTie
AlertsFire Alerts, Low Battery AlertsFire Alerts, Low Battery AlertsTie
Built-in SirenYESYESTie
Built-in LightYESYESTie
Tests ItselfNONOTie

What the differences mean

Automations and platform support

The Shelly Plus Smoke Alarm integrates with Google Home, Samsung SmartThings and Home Assistant, supports MQTT and can trigger scenes and other devices when smoke is detected. The X-Sense Wi-Fi Smoke Alarm has no such integrations and reports through its own app only, so it cannot turn on a light or trigger a routine.

Battery life

The X-Sense Wi-Fi Smoke Alarm is rated for ten years on its CR123A battery, against five on the Shelly Plus Smoke Alarm, so it asks for far fewer replacements over its life.

Warranty

The X-Sense Wi-Fi Smoke Alarm carries a five-year warranty, two years longer than the Shelly Plus Smoke Alarm's three, which suits a device meant to sit on a ceiling untouched.

Pairing path

Both join 2.4GHz Wi-Fi directly, but the Shelly Plus Smoke Alarm also uses Bluetooth for pairing, which can smooth the initial setup. The X-Sense Wi-Fi Smoke Alarm pairs over Wi-Fi alone and some owners report only a narrow window to finish it.

What they share

Neither detects carbon monoxide, neither has a screen, both have a built-in siren and a built-in light, and neither works with Alexa, Apple HomeKit or Matter. On the core job of a loud alarm and a phone alert, the two are much closer than the specs suggest.

Which one to buy if

Shelly

Shelly Plus Smoke Alarm

12% OFF
Prime exclusive deal
€52.54
€59.99

Last recorded price

Buy on Amazon Italy
  • + Connectivity: 2.4 GHz WiFi, Bluetooth
  • + Integrations: Google Home, Samsung SmartThings, Home Assistant
  • - Price: €52.54 vs €24.06
  • - Warranty: 3 years vs 5 years
Winner
X-Sense

X-Sense Wi-Fi Smoke Alarm

Prime exclusive deal
€24.06

Last recorded price

Buy on Amazon Italy
  • + Price: €24.06
  • + Warranty: 5 years
  • + Battery Life: 10 years
  • - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, Bluetooth
  • - Integrations: Home Assistant vs Google Home, Samsung SmartThings, Home Assistant

What owners say

Both groups of owners wanted a connected smoke alarm without a hub, and both describe the setup as quick over 2.4GHz Wi-Fi. Shelly Plus Smoke Alarm owners are the more technical crowd, talking about wiring the alarm into Home Assistant, MQTT and Loxone so it drives notifications and scenes, and they like the loud siren and five-year battery. Their watch-outs are the absent CO sensor, no Apple HomeKit or Matter, no self-test, and a short pairing window, with a few reports of false alarms after months of use. X-Sense Wi-Fi Smoke Alarm owners bought for simplicity, praising real-time phone alerts on rental and holiday properties, the solid build and the replaceable battery, and they flag the same gaps: smoke only, no integrations, no automatic self-test, and an English-only app.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Shelly Plus Smoke Alarm
  • X-Sense Wi-Fi Smoke Alarm

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Frequently Asked Questions

Which is better, the Shelly Plus Smoke Alarm or the X-Sense Wi-Fi Smoke Alarm?

It depends on what the alarm has to do. The X-Sense Wi-Fi Smoke Alarm offers a ten-year battery and a five-year warranty in a simple, hub-free phone-alert alarm. The Shelly Plus Smoke Alarm gives up some battery span but joins Google Home, SmartThings and Home Assistant and can trigger automations, which the X-Sense cannot.

Do either of these detect carbon monoxide?

No. Both the Shelly Plus Smoke Alarm and the X-Sense Wi-Fi Smoke Alarm are smoke-only, with no CO sensor and no CO alerts, so a home with gas appliances still needs a separate carbon monoxide detector in each case.

Do these alarms need a hub?

Neither needs a hub. The Shelly Plus Smoke Alarm and the X-Sense Wi-Fi Smoke Alarm both connect directly over 2.4GHz Wi-Fi, with the Shelly also using Bluetooth for pairing. No bridge or base station is involved.

Which has the longer battery life?

The X-Sense Wi-Fi Smoke Alarm is rated for ten years on a replaceable CR123A cell, while the Shelly Plus Smoke Alarm is rated for five. Both alert you through the app when the battery needs changing.

Which alarm works with more smart home platforms?

The Shelly Plus Smoke Alarm. It supports Google Home, Samsung SmartThings and Home Assistant, along with MQTT for third-party systems like Loxone. The X-Sense Wi-Fi Smoke Alarm has no Alexa, Google Home, HomeKit, SmartThings or Matter support and lives only in its own app.

Who should buy the Shelly Plus Smoke Alarm?

Home Assistant, MQTT or Shelly households that want a smoke alarm to feed automations and notifications, and that value integration over battery span. Buyers who simply want a long-lived connected alarm with the least configuration are better served by the X-Sense Wi-Fi Smoke Alarm.

Full comparison table

Compare all 25 Smoke & CO Detectors side by side

You are looking at two of them. The full table lines up all Smoke & CO Detectors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.

  • 25 Smoke & CO Detectors
  • 44 specs compared
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