Data from Amazon and official Shelly and X-Sense sites.
2026 verdict
For this 2026 head-to-head, X-Sense Wi-Fi Carbon Monoxide Alarm has the better all-around case. Its clearest strengths are price, rating, and warranty, and it still looks stronger on screen. Shelly Plus Smoke Alarm is the better fit only for buyers who prioritize connectivity and integrations above everything else here. That makes X-Sense Wi-Fi Carbon Monoxide Alarm the clearer recommendation in 2026.
| Feature | Shelly Plus Smoke Alarm | X-Sense Wi-Fi Carbon Monoxide Alarm | Winner |
|---|---|---|---|
| Price | €39.95 | €28.73 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Rating | 4.3 | 4.6 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Warranty | 3 years | 5 years | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Connectivity | 2.4 GHz Wifi, Bluetooth | 2.4 GHz Wifi | Shelly Plus Smoke Alarm |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | None | Shelly Plus Smoke Alarm |
| Screen | NO | YES | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Sensors | Smoke | CO | Tie |
| Alerts | Fire Alerts, Low Battery Alerts | CO 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 |
25% OFF
€53.43
€39.95
- + Connectivity: 2.4 GHz Wifi, Bluetooth
- + Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant
- - Price: €39.95 vs €28.73
- - Rating: 4.3 vs 4.6
Winner
28% OFF
€39.99
€28.73
- + Price: €28.73
- + Rating: 4.6
- + Warranty: 5 years
- - Connectivity: 2.4 GHz Wifi vs 2.4 GHz Wifi, Bluetooth
- - Integrations: None vs Google Home, Alexa, Samsung SmartThings, Home Assistant
Frequently Asked Questions (FAQ)
- Which is better overall: Shelly Plus Smoke Alarm or X-Sense Wi-Fi Carbon Monoxide Alarm?
- X-Sense Wi-Fi Carbon Monoxide Alarm has the stronger overall profile in this comparison, especially for price, rating, and warranty.
- What is the biggest difference between Shelly Plus Smoke Alarm and X-Sense Wi-Fi Carbon Monoxide Alarm?
- Price is one of the clearest differences: Shelly Plus Smoke Alarm lists €39.95, while X-Sense Wi-Fi Carbon Monoxide Alarm lists €28.73.
- Which one looks better on price?
- Shelly Plus Smoke Alarm is listed at €39.95, while X-Sense Wi-Fi Carbon Monoxide Alarm is listed at €28.73. X-Sense Wi-Fi Carbon Monoxide Alarm (better spec).
- Who should buy Shelly Plus Smoke Alarm?
- Choose Shelly Plus Smoke Alarm if your priority is connectivity and integrations and that matters more than price.
- Who should buy X-Sense Wi-Fi Carbon Monoxide Alarm?
- Choose X-Sense Wi-Fi Carbon Monoxide Alarm if your priority is price and rating and that matters more than connectivity.
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