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Smoke & CO Detectors · Head to head

Kidde Smart Smoke Alarm (P4010ACS-WF) vs X-Sense Wi-Fi Carbon Monoxide Alarm

Full Smart Smoke & CO Detectors comparison in 2026

Updated September 2026
Data from Amazon and official Kidde and X-Sense sites.
2026 verdict
For most buyers in 2026, X-Sense Wi-Fi Carbon Monoxide Alarm is the safer pick over Kidde Smart Smoke Alarm (P4010ACS-WF) because of rating, screen, and Built-in light.
X-Sense Wi-Fi Carbon Monoxide Alarm
Winner
X-Sense Wi-Fi Carbon Monoxide Alarm
Buy on Amazon UKCheck price
It has the clearer edge on rating, screen, and Built-in light, and it stays ahead on its broader overall balance. Kidde Smart Smoke Alarm (P4010ACS-WF) still makes sense if warranty and integrations are your priority, but most buyers should still lean toward X-Sense Wi-Fi Carbon Monoxide Alarm. In practical terms, X-Sense Wi-Fi Carbon Monoxide Alarm is the easier product to recommend.
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FeatureKidde Smart Smoke Alarm (P4010ACS-WF)X-Sense Wi-Fi Carbon Monoxide AlarmWinner
Rating3.24.6X-Sense Wi-Fi Carbon Monoxide Alarm
Warranty10 years5 yearsKidde Smart Smoke Alarm (P4010ACS-WF)
IntegrationsGoogle Home, Alexa, Home AssistantHome AssistantKidde Smart Smoke Alarm (P4010ACS-WF)
ScreenNOYESX-Sense Wi-Fi Carbon Monoxide Alarm
Built-in LightNOYESX-Sense Wi-Fi Carbon Monoxide Alarm
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
SensorsSmokeCOTie
AlertsFire Alerts, Low Battery AlertsCO Alerts, Low Battery AlertsTie
Built-in SirenYESYESTie
PathlightNONOTie
Steam CheckNONOTie

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 Wi-Fi Carbon Monoxide Alarm

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Frequently Asked Questions

Which is better overall: Kidde Smart Smoke Alarm (P4010ACS-WF) 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 rating, screen, and Built-in light.

What is the biggest difference between Kidde Smart Smoke Alarm (P4010ACS-WF) and X-Sense Wi-Fi Carbon Monoxide Alarm?

Rating is one of the clearest differences: Kidde Smart Smoke Alarm (P4010ACS-WF) lists 3.2, while X-Sense Wi-Fi Carbon Monoxide Alarm lists 4.6.

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 Wi-Fi Carbon Monoxide Alarm?

Choose X-Sense Wi-Fi Carbon Monoxide Alarm 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

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  • 24 Smoke & CO Detectors
  • 44 specs compared
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