Winner
Updated November 2026
Data from the official Kidde and X-Sense sites.
2026 verdict
Across the 2026 comparison, Kidde Smart Smoke + Indoor Air Quality Alarm earns the nod over X-Sense Wi-Fi Carbon Monoxide Alarm on the strength of warranty, integrations, and sensors.
The main reason it wins is warranty, integrations, and sensors, and alerts strengthen that case. There is still a case for X-Sense Wi-Fi Carbon Monoxide Alarm, but mainly if price, rating, and screen are what you value most. Overall, Kidde Smart Smoke + Indoor Air Quality Alarm makes more sense for most people.
Works with
Connectivity
- Wi-Fi 2.4 GHz
vs
Works with
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Kidde Smart Smoke + Indoor Air Quality Alarm | X-Sense Wi-Fi Carbon Monoxide Alarm | Winner |
|---|---|---|---|
| Price | $113.84 | £35.99 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Rating | 3.4 | 4.6 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Warranty | 10 years | 5 years | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Integrations | Google Home, Home Assistant | Home Assistant | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Screen | NO | YES | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Sensors | Smoke, Humidity, Air Quality | CO | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Alerts | Fire Alerts, Low Battery Alerts, Air Quality Alerts | CO Alerts, Low Battery Alerts | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi | Tie |
| Built-in Siren | YES | YES | Tie |
| Built-in Light | YES | YES | Tie |
| Pathlight | NO | NO | Tie |
| Steam Check | NO | NO | Tie |
Winner
$113.84
- + Warranty: 10 years
- + Integrations: Google Home, Home Assistant
- + Sensors: Smoke, Humidity, Air Quality
- - Price: $113.84 vs £35.99
- - Rating: 3.4 vs 4.6
£35.99
- + Price: £35.99
- + Rating: 4.6
- + Screen: YES
- - Warranty: 5 years vs 10 years
- - Integrations: Home Assistant vs Google Home, Home Assistant
Frequently Asked Questions
Which is better overall: Kidde Smart Smoke + Indoor Air Quality Alarm or X-Sense Wi-Fi Carbon Monoxide Alarm?
Kidde Smart Smoke + Indoor Air Quality Alarm has the stronger overall profile in this comparison, especially for warranty, integrations, and sensors.
What is the biggest difference between Kidde Smart Smoke + Indoor Air Quality Alarm and X-Sense Wi-Fi Carbon Monoxide Alarm?
Price is one of the clearest differences: Kidde Smart Smoke + Indoor Air Quality Alarm lists $113.84, while X-Sense Wi-Fi Carbon Monoxide Alarm lists £35.99.
Which one looks better on price?
Kidde Smart Smoke + Indoor Air Quality Alarm is listed at $113.84, while X-Sense Wi-Fi Carbon Monoxide Alarm is listed at £35.99. X-Sense Wi-Fi Carbon Monoxide Alarm (better spec).
Who should buy Kidde Smart Smoke + Indoor Air Quality Alarm?
Choose Kidde Smart Smoke + Indoor Air Quality Alarm if your priority is warranty 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 warranty.
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