Winner
Updated October 2026
Data from Amazon and official Kidde and X-Sense sites.
2026 verdict
Kidde Smart Smoke + Indoor Air Quality Alarm edges out X-Sense WiFi Smoke & CO Detector in 2026, led by warranty, integrations, and sensors.
It builds its lead on warranty, integrations, and sensors, then backs it up with a stronger showing on its broader overall balance. X-Sense WiFi Smoke & CO Detector can still be the right pick, but only if price, rating, and screen outweigh the wider strengths of Kidde Smart Smoke + Indoor Air Quality Alarm. That keeps the verdict firmly in favor of Kidde Smart Smoke + Indoor Air Quality Alarm.
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| Feature | Kidde Smart Smoke + Indoor Air Quality Alarm | X-Sense WiFi Smoke & CO Detector | Winner |
|---|---|---|---|
| Price | $111.48 | €59.18 | X-Sense WiFi Smoke & CO Detector |
| Rating | 3.3 | 4.5 | X-Sense WiFi Smoke & CO Detector |
| 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 WiFi Smoke & CO Detector |
| Sensors | Smoke, Humidity, Air Quality | Smoke, CO | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi | Tie |
| Alerts | Fire Alerts, Low Battery Alerts, Air Quality Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | Tie |
| Built-in Siren | YES | YES | Tie |
| Built-in Light | YES | YES | Tie |
| Pathlight | NO | NO | Tie |
| Steam Check | NO | NO | Tie |
Winner
$111.48
- + Warranty: 10 years
- + Integrations: Google Home, Home Assistant
- + Sensors: Smoke, Humidity, Air Quality
- - Price: $111.48 vs €59.18
- - Rating: 3.3 vs 4.5
€59.18
- + Price: €59.18
- + Rating: 4.5
- + 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 WiFi Smoke & CO Detector?
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 WiFi Smoke & CO Detector?
Price is one of the clearest differences: Kidde Smart Smoke + Indoor Air Quality Alarm lists $111.48, while X-Sense WiFi Smoke & CO Detector lists €59.18.
Which one looks better on price?
Kidde Smart Smoke + Indoor Air Quality Alarm is listed at $111.48, while X-Sense WiFi Smoke & CO Detector is listed at €59.18. X-Sense WiFi Smoke & CO Detector (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 WiFi Smoke & CO Detector?
Choose X-Sense WiFi Smoke & CO Detector if your priority is price and rating and that matters more than warranty.
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
- 41 filters
YoLinkPhotoelectric Smoke Alarm
Last priceSep 11, 2026$49.99
Unavailable
HeimanMatter Smoke Detector S1-TM
20% OFF
$49.98$39.98
GoogleNest Protect (Wired)
$499.99
X-SenseWi-Fi CO Alarm
32% OFF€39.99€27.11
X-SenseSC07-MR Smart Smoke & CO Alarm
HeimanHS1SA-E Zigbee Smoke Alarm
€30.49
X-SenseWiFi Smoke & CO Detector
€59.18
X-SenseWi-Fi Smoke Alarm
€24.06
GoogleNest Protect (Battery)
Last priceOct 1, 2026$399.99
Unavailable
ShellySmoke Alarm
12% OFF€59.99€52.54
EufySmoke Alarm E10
37% OFF$59.99$37.99
X-SenseXC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
21% OFF€35.99€28.43
HeimanInterconnected Smoke Alarm S1-R
20% OFF$25.99$20.79
AqaraSmart Smoke Detector
€44.99
KiddeSmart Smoke & CO Detector with Ring
$69.97
HeimanInterconnected CO Alarm C1-R
20% OFF$29.98$23.98
First AlertSC5 Battery Smart Smoke & CO Alarm
Unavailable
HeimanSmart CO Alarm
20% OFF$59.99$47.99
HeimanMatter Smoke Detector S1-M
$39.99
First AlertSMCO410 Smoke Detector & CO Alarm
$64.98
Smoke & CO DetectorsKiddeSmart Smoke Alarm (P4010ACS-WF)
3.2(316)Last priceOct 5, 2026$40.79
Unavailable- Smoke & CO DetectorsKidde
Smart Smoke & CO Detector with Ring
4.3(458)$69.97 - Smoke & CO DetectorsKidde
Smart Smoke + Indoor Air Quality Alarm
3.3(199)$111.48 
Water Leak SensorsKiddeWiFi Water Leak & Freeze Detector
4.0(738)32% OFF$34.97$23.92
Air Quality MonitorsX-SenseXR0A-iR Wi-Fi Radon Detector
4.4(42)24% OFF$99.99$75.99
HubsX-SenseSBS50 Base Station
4.5(109)$29.99
Motion SensorsX-SenseSolar Outdoor Spotlight - Motion-Sensor
4.2(53)Last priceMar 13, 2026$58.89
Unavailable- Smoke & CO DetectorsX-Sense
SC07-MR Smart Smoke & CO Alarm
4.6(692) 
Smoke & CO DetectorsX-SenseSD19-MN Interconnected Smart Smoke Alarm
28% OFF€29.99€21.59- Smoke & CO DetectorsX-Sense
Wi-Fi CO Alarm
4.6(1,477)32% OFF€39.99€27.11 - Smoke & CO DetectorsX-Sense
Wi-Fi Smoke Alarm
4.5(405)€24.06 - Smoke & CO DetectorsX-Sense
WiFi Smoke & CO Detector
4.5(4,336)€59.18 - Smoke & CO DetectorsX-Sense
XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
4.4(140)21% OFF€35.99€28.43 
Smoke & CO DetectorsX-SenseXP0J-iA Smart Hardwired Smoke & CO Alarm
$48.99
Temperature & Humidity SensorsX-SenseSmart WiFi Indoor Thermometer
4.4(163)33% OFF$14.99$9.99
Temperature & Humidity SensorsX-SenseSTH0B Smart Thermometer Hygrometer
4.4(163)33% OFF$14.99$9.99
Water Leak SensorsX-Sense2-in-1 Wi-Fi Water Leak & Freeze Detector
3.0(104)17% OFF$17.99$14.99
Water Leak SensorsX-SenseWi-Fi Water Leak Detector
4.5(2,265)29% OFF$15.99$11.39