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Smoke & CO Detectors · Head to head

Kidde Smart Smoke + Indoor Air Quality Alarm vs X-Sense Wi-Fi Carbon Monoxide Alarm

Full Smart Smoke & CO Detectors comparison in 2026

Updated October 2026
Data from Amazon and 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.
Kidde Smart Smoke + Indoor Air Quality Alarm
Winner
Kidde Smart Smoke + Indoor Air Quality Alarm
$111.59
Buy on Amazon USA
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.
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FeatureKidde Smart Smoke + Indoor Air Quality AlarmX-Sense Wi-Fi Carbon Monoxide AlarmWinner
Price$111.59€39.99X-Sense Wi-Fi Carbon Monoxide Alarm
Rating3.34.6X-Sense Wi-Fi Carbon Monoxide Alarm
Warranty10 years5 yearsKidde Smart Smoke + Indoor Air Quality Alarm
IntegrationsGoogle Home, Home AssistantHome AssistantKidde Smart Smoke + Indoor Air Quality Alarm
ScreenNOYESX-Sense Wi-Fi Carbon Monoxide Alarm
SensorsSmoke, Humidity, Air QualityCOKidde Smart Smoke + Indoor Air Quality Alarm
AlertsFire Alerts, Low Battery Alerts, Air Quality AlertsCO Alerts, Low Battery AlertsKidde Smart Smoke + Indoor Air Quality Alarm
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
Built-in SirenYESYESTie
Built-in LightYESYESTie
PathlightNONOTie
Steam CheckNONOTie

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 $111.59, while X-Sense Wi-Fi Carbon Monoxide Alarm lists €39.99.

Which one looks better on price?

Kidde Smart Smoke + Indoor Air Quality Alarm is listed at $111.59, while X-Sense Wi-Fi Carbon Monoxide Alarm is listed at €39.99. 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.

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
Open the full comparison
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25 smart smoke and CO detectors from 9 brands compared: X-Sense, First Alert, Kidde, Google Nest and more. Sensor types, interlink and alerts.

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