First Alert SMCO410 Smoke Detector & CO Alarm vs X-Sense Wi-Fi Smoke Alarm

The First Alert SMCO410 Smoke Detector & CO Alarm is the stronger safety device overall because it detects both smoke and carbon monoxide, works with Z-Wave and Home Assistant, adds Steam Check to reduce cooking false alarms, and carries a 10-year warranty. The X-Sense Wi-Fi Smoke Alarm is smoke-only, but it is the better-reviewed unit and adds a built-in light.

The biggest difference is hazard coverage. The First Alert SMCO410 Smoke Detector & CO Alarm senses both smoke and carbon monoxide, while the X-Sense Wi-Fi Smoke Alarm detects smoke only and has no CO sensor or CO alerts, so it would need a separate CO detector for full protection.

The First Alert connects over Z-Wave and works with Home Assistant, so it can join a hub-based smart home. The X-Sense Wi-Fi Smoke Alarm connects directly over 2.4GHz WiFi to its own app with no hub, but it has no third-party platform integrations at all.

The X-Sense Wi-Fi Smoke Alarm has a built-in light, while the First Alert SMCO410 Smoke Detector & CO Alarm does not. Both include a loud built-in siren and low-battery alerts.

Buy the First Alert SMCO410 Smoke Detector & CO Alarm if you want one unit covering both smoke and carbon monoxide, value a long 10-year warranty, and want it to integrate with a Z-Wave or Home Assistant smart home.

Buy the X-Sense Wi-Fi Smoke Alarm if you only need smoke detection with simple WiFi phone alerts and no hub, want a built-in light, and are happy pairing a separate carbon monoxide detector for CO coverage.