Winner
Price unavailable right now
Updated November 2026
Data from the official Google and Kidde sites.
2026 verdict
Across the 2026 comparison, Google Nest Protect (Wired) earns the nod over Kidde Smart Smoke + Indoor Air Quality Alarm on the strength of rating, connectivity, and sensors.
Its strongest advantages show up in rating, connectivity, and sensors, with pathlight and steam check helping widen the gap. Pick Kidde Smart Smoke + Indoor Air Quality Alarm only when warranty is the deciding factor for your setup. That keeps the verdict firmly in favor of Google Nest Protect (Wired).
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| Feature | Google Nest Protect (Wired) | Kidde Smart Smoke + Indoor Air Quality Alarm | Winner |
|---|---|---|---|
| Rating | 4.6 | 3.4 | Google Nest Protect (Wired) |
| 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 (Wired) |
| Sensors | Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion | Smoke, Humidity, Air Quality | Google Nest Protect (Wired) |
| Pathlight | YES | NO | Google Nest Protect (Wired) |
| Steam Check | YES | NO | Google Nest Protect (Wired) |
| 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: 4.6
- + 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 4.6
- - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, Bluetooth, Other
Frequently Asked Questions
Which is better overall: Google Nest Protect (Wired) or Kidde Smart Smoke + Indoor Air Quality Alarm?
Google Nest Protect (Wired) has the stronger overall profile in this comparison, especially for rating, connectivity, and sensors.
What is the biggest difference between Google Nest Protect (Wired) and Kidde Smart Smoke + Indoor Air Quality Alarm?
Rating is one of the clearest differences: Google Nest Protect (Wired) lists 4.6, while Kidde Smart Smoke + Indoor Air Quality Alarm lists 3.4.
Who should buy Google Nest Protect (Wired)?
Choose Google Nest Protect (Wired) 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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Carbon Monoxide Detector C1-S
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Smoke and CO Alarm HM-636THS
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Matter Smoke Detector S1-TM
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SD19-MN Interconnected Smart Smoke Alarm
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Wi-Fi Smoke Alarm
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Smart Smoke & CO Detector with Ring
- Smoke & CO Detectors
Smoke Alarm E10
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Smoke Alarm HM-636PHS
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Interconnected Smoke Alarm S1-R
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Interconnected CO Alarm C1-R
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SC5 Battery Smart Smoke & CO Alarm
- 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 (Battery)
- 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
