Winner
Price unavailable right now
Updated November 2026
Data from the official Google and Kidde sites.
2026 verdict
In this 2026 Google Nest Protect (Battery) vs Kidde Smart Smoke + Indoor Air Quality Alarm comparison, Google Nest Protect (Battery) comes out ahead thanks to rating, connectivity, and sensors.
It wins the broader comparison through rating, connectivity, and sensors, while pathlight and steam check help confirm the result. Kidde Smart Smoke + Indoor Air Quality Alarm remains a niche alternative if warranty matters more than the rest of the comparison. That is why Google Nest Protect (Battery) wins the verdict here.
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| Feature | Google Nest Protect (Battery) | Kidde Smart Smoke + Indoor Air Quality Alarm | Winner |
|---|---|---|---|
| Rating | 4.4 | 3.4 | Google Nest Protect (Battery) |
| Warranty | 2 years | 10 years | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Other | 2.4 GHz WiFi | Google Nest Protect (Battery) |
| Sensors | Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion | Smoke, Humidity, Air Quality | Google Nest Protect (Battery) |
| Pathlight | YES | NO | Google Nest Protect (Battery) |
| Steam Check | YES | NO | Google Nest Protect (Battery) |
| Integrations | Google Home, Home Assistant | Google Home, Home Assistant | Tie |
| Screen | NO | NO | Tie |
| Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | Fire Alerts, Low Battery Alerts, Air Quality Alerts | Tie |
| Built-in Siren | YES | YES | Tie |
| Built-in Light | YES | YES | Tie |
| Local Control | Partially | Partially | Tie |
Winner
Price unavailable right now
- + Rating: 4.4
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Other
- + Sensors: Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion
- - Warranty: 2 years vs 10 years
$113.84
- + Warranty: 10 years
- - Rating: 3.4 vs 4.4
- - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, Bluetooth, Other
Frequently Asked Questions
Which is better overall: Google Nest Protect (Battery) or Kidde Smart Smoke + Indoor Air Quality Alarm?
Google Nest Protect (Battery) has the stronger overall profile in this comparison, especially for rating, connectivity, and sensors.
What is the biggest difference between Google Nest Protect (Battery) and Kidde Smart Smoke + Indoor Air Quality Alarm?
Rating is one of the clearest differences: Google Nest Protect (Battery) lists 4.4, while Kidde Smart Smoke + Indoor Air Quality Alarm lists 3.4.
Who should buy Google Nest Protect (Battery)?
Choose Google Nest Protect (Battery) if your priority is rating and connectivity and that matters more than warranty.
Who should buy Kidde Smart Smoke + Indoor Air Quality Alarm?
Choose Kidde Smart Smoke + Indoor Air Quality Alarm if your priority is warranty and that matters more than rating.
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Compare all 28 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.
- 28 Smoke & CO Detectors
- 45 specs compared
- 42 filters
- Smoke & CO Detectors
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- Cameras
Nest Cam (outdoor or indoor, battery)
- Cameras
Nest Cam Floodlight
- Cameras
Nest Cam Indoor (Wired, 3rd Gen)
- Cameras
Nest Cam Outdoor (Wired, 2nd Gen)
- Cameras
Nest Cam (indoor, wired)
- Displays
Nest Hub (2nd Gen)
- Displays
Nest Hub Max
- Doorbells
Nest Doorbell (battery)
- Doorbells
Nest Doorbell (wired, 3rd Gen)
- Doorbells
Nest Doorbell (wired, 2nd Gen)
- Door Locks
Nest x Yale Lock
- Routers
Nest WiFi Pro
- Smoke & CO Detectors
Nest Protect (Wired)
- Speakers
Nest Audio
- Speakers
Nest Mini (2nd gen)
- Streaming Devices
TV Streamer (4K)
- Temperature & Humidity Sensors
Nest Temperature Sensor (2nd gen)
- Temperature & Humidity Sensors
Nest Temperature Sensor
- Thermostats
Nest Learning Thermostat (4th gen)
- Thermostats
Nest Learning Thermostat
