Smoke & CO Detectors · Head to head

First Alert SMCO410 Smoke Detector & CO Alarm vs Google Nest Protect (Battery)

Full Smart Smoke & CO Detectors comparison in 2026

Data from Amazon and official First Alert and Google sites.
2026 verdict
In this 2026 Google Nest Protect (Battery) vs First Alert SMCO410 Smoke Detector & CO Alarm comparison, Google Nest Protect (Battery) comes out ahead thanks to rating, connectivity, and integrations. The main reason it wins is rating, connectivity, and integrations, and sensors and built-in light strengthens that case. First Alert SMCO410 Smoke Detector & CO Alarm remains a niche alternative if price and warranty matters more than the rest of the comparison. Overall, Google Nest Protect (Battery) makes more sense for most people.
vs
FeatureFirst Alert SMCO410 Smoke Detector & CO AlarmGoogle Nest Protect (Battery)Winner
Price$60.48$158.29First Alert SMCO410 Smoke Detector & CO Alarm
Rating3.44.6Google Nest Protect (Battery)
Warranty10 years2 yearsFirst Alert SMCO410 Smoke Detector & CO Alarm
ConnectivityZ-Wave2.4 GHz WiFi, BluetoothGoogle Nest Protect (Battery)
IntegrationsNoneGoogle Home, Home AssistantGoogle Nest Protect (Battery)
SensorsSmoke, COSmoke, CO, Occupancy, Temperature, Humidity, Ambient Light, MotionGoogle Nest Protect (Battery)
Built-in LightNOYESGoogle Nest Protect (Battery)
Tests ItselfNOYESGoogle Nest Protect (Battery)
PathlightNOYESGoogle Nest Protect (Battery)
ScreenNONOTie
AlertsFire Alerts, CO Alerts, Low Battery AlertsFire Alerts, CO Alerts, Low Battery AlertsTie
Built-in SirenYESYESTie

Frequently Asked Questions (FAQ)

Which is better overall: First Alert SMCO410 Smoke Detector & CO Alarm or Google Nest Protect (Battery)?
Google Nest Protect (Battery) has the stronger overall profile in this comparison, especially for rating, connectivity, and integrations.
What is the biggest difference between First Alert SMCO410 Smoke Detector & CO Alarm and Google Nest Protect (Battery)?
Price is one of the clearest differences: First Alert SMCO410 Smoke Detector & CO Alarm lists $60.48, while Google Nest Protect (Battery) lists $158.29.
Which one looks better on price?
First Alert SMCO410 Smoke Detector & CO Alarm is listed at $60.48, while Google Nest Protect (Battery) is listed at $158.29. First Alert SMCO410 Smoke Detector & CO Alarm (better spec).
Who should buy First Alert SMCO410 Smoke Detector & CO Alarm?
Choose First Alert SMCO410 Smoke Detector & CO Alarm if your priority is price and warranty and that matters more than rating.
Who should buy Google Nest Protect (Battery)?
Choose Google Nest Protect (Battery) if your priority is rating and connectivity and that matters more than price.
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