Updated September 2026
Data from Amazon and official Kidde and X-Sense sites.
2026 verdict
X-Sense WiFi Smoke & CO Detector beats Kidde Smart Smoke Alarm (P4010ACS-WF) in 2026, with its clearest edge on rating, screen, and sensors.
It builds its lead on rating, screen, and sensors, then backs it up with a stronger showing on alerts and Built-in light. Choose Kidde Smart Smoke Alarm (P4010ACS-WF) only if warranty and integrations matter more to you than the broader advantage from X-Sense WiFi Smoke & CO Detector. As a general recommendation, X-Sense WiFi Smoke & CO Detector comes out on top.
vs
Winner
Price unavailable right now
Price alerts
Smoke & CO Detector prices change while you decide
We check the price of every Smoke & CO Detector in the catalog daily and email you the drops, whichever one you pick.
No spam. Unsubscribe in one click.
| Feature | Kidde Smart Smoke Alarm (P4010ACS-WF) | X-Sense WiFi Smoke & CO Detector | Winner |
|---|---|---|---|
| Rating | 3.2 | 4.5 | X-Sense WiFi Smoke & CO Detector |
| Warranty | 10 years | 5 years | Kidde Smart Smoke Alarm (P4010ACS-WF) |
| Integrations | Google Home, Alexa, Home Assistant | Home Assistant | Kidde Smart Smoke Alarm (P4010ACS-WF) |
| Screen | NO | YES | X-Sense WiFi Smoke & CO Detector |
| Sensors | Smoke | Smoke, CO | X-Sense WiFi Smoke & CO Detector |
| Alerts | Fire Alerts, Low Battery Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | X-Sense WiFi Smoke & CO Detector |
| Built-in Light | NO | YES | X-Sense WiFi Smoke & CO Detector |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi | Tie |
| Built-in Siren | YES | YES | Tie |
| Pathlight | NO | NO | Tie |
| Steam Check | NO | NO | Tie |
- + Warranty: 10 years
- + Integrations: Google Home, Alexa, Home Assistant
- - Rating: 3.2 vs 4.5
- - Screen: NO vs YES
Winner
Price unavailable right now
- + Rating: 4.5
- + Screen: YES
- + Sensors: Smoke, CO
- - Warranty: 5 years vs 10 years
- - Integrations: Home Assistant vs Google Home, Alexa, Home Assistant
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.
- Kidde Smart Smoke Alarm (P4010ACS-WF)
- X-Sense WiFi Smoke & CO Detector
Loading price history...
Frequently Asked Questions
Which is better overall: Kidde Smart Smoke Alarm (P4010ACS-WF) or X-Sense WiFi Smoke & CO Detector?
X-Sense WiFi Smoke & CO Detector has the stronger overall profile in this comparison, especially for rating, screen, and sensors.
What is the biggest difference between Kidde Smart Smoke Alarm (P4010ACS-WF) and X-Sense WiFi Smoke & CO Detector?
Rating is one of the clearest differences: Kidde Smart Smoke Alarm (P4010ACS-WF) lists 3.2, while X-Sense WiFi Smoke & CO Detector lists 4.5.
Who should buy Kidde Smart Smoke Alarm (P4010ACS-WF)?
Choose Kidde Smart Smoke Alarm (P4010ACS-WF) if your priority is warranty and integrations and that matters more than rating.
Who should buy X-Sense WiFi Smoke & CO Detector?
Choose X-Sense WiFi Smoke & CO Detector if your priority is rating and screen and that matters more than warranty.
Full comparison table
Compare all 24 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.
- 24 Smoke & CO Detectors
- 44 specs compared
- 41 filters
YoLinkPhotoelectric Smoke Alarm
$49.99
HeimanMatter Smoke Detector S1-TM
$49.98
GoogleNest Protect (Wired)
$449.99
X-SenseWi-Fi CO Alarm
X-SenseSC07-MR Smart Smoke & CO Alarm
HeimanHS1SA Series Smoke Alarm
5% OFF£16.99£16.14- X-Sense
WiFi Smoke & CO Detector
X-SenseWi-Fi Smoke Alarm
GoogleNest Protect (Battery)
$406.99
ShellySmoke Alarm
25% OFF€53.43€39.95
KiddeSmart Smoke & CO Detector with Ring
$69.97
X-SenseXC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
AqaraSmart Smoke Detector
16% OFF€44.99€37.99
HeimanInterconnected Smoke Alarm S1-R
$25.99
HeimanInterconnected CO Alarm C1-R
10% OFF$29.98$26.99
First AlertSC5 Battery Smart Smoke & CO Alarm
HeimanSmart CO Alarm
20% OFF$59.99$47.99
HeimanMatter Smoke Detector S1-M
$39.99
First AlertSMCO410 Smoke Detector & CO Alarm
11% OFF$64.98$57.99
KiddeSmart Smoke + Indoor Air Quality Alarm
$106.72
- Smoke & CO DetectorsKidde
Smart Smoke Alarm (P4010ACS-WF)
3.2(316)$40.79 - Smoke & CO DetectorsKidde
Smart Smoke & CO Detector with Ring
4.4(445)$69.97 - Smoke & CO DetectorsKidde
Smart Smoke + Indoor Air Quality Alarm
3.3(198)$106.72 
Water Leak SensorsKiddeWiFi Water Leak & Freeze Detector
3.9(737)37% OFF$34.97$21.99
Air Quality MonitorsX-SenseXR0A-iR Wi-Fi Radon Detector
4.2(23)$99.99
HubsX-SenseSBS50 Base Station
4.5(108)$29.99
Motion SensorsX-SenseSolar Outdoor Spotlight - Motion-Sensor
4.2(53)9% OFF$64.99$58.89- Smoke & CO DetectorsX-Sense
SC07-MR Smart Smoke & CO Alarm
4.6(692) 
Smoke & CO DetectorsX-SenseSD19-MN Interconnected Smart Smoke Alarm
33% OFF$32.99$21.99- Smoke & CO DetectorsX-Sense
Wi-Fi CO Alarm
4.6(1,477) - Smoke & CO DetectorsX-Sense
Wi-Fi Smoke Alarm
4.5(392) - Smoke & CO DetectorsX-Sense
WiFi Smoke & CO Detector
4.5(4,336) - Smoke & CO DetectorsX-Sense
XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
4.4(140) 
Smoke & CO DetectorsX-SenseXP0J-iA Smart Hardwired Smoke & CO Alarm
$48.99
Temperature & Humidity SensorsX-SenseSmart WiFi Indoor Thermometer
4.5(161)23% OFF$14.99$11.59
Temperature & Humidity SensorsX-SenseSTH0B Smart Thermometer Hygrometer
4.5(161)6% OFF$12.34$11.59
Water Leak SensorsX-Sense2-in-1 Wi-Fi Water Leak & Freeze Detector
3.0(102)17% OFF$17.99$14.99
Water Leak SensorsX-SenseWi-Fi Water Leak Detector
4.6(2,237)25% OFF$15.99$11.99