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Smart smoke detectors send alerts to your phone, distinguish between real fires and burnt toast, and interconnect wirelessly. We tested the top smart detectors for reliability and alert quality.
Best Overall
Google Nest Protect (2nd Gen)
Our top-rated pick — skip to the full review below or check it on Amazon now.
Quick Picks
2 TOP CHOICES
Google Nest Protect (2nd Gen)
Smartest smoke and CO detection with phone alerts
Sensors: Split-spectrum smoke + CO
Alerts: Phone, voice, interconnect
The Nest Protect is still the best smart smoke detector you can buy.
Check Today's PriceX-Sense XS01-M ProConnected
Affordable interconnected smart smoke detection
Sensors: Photoelectric smoke
Alerts: Phone via X-Sense app
The X-Sense XS01-M delivers smart features at a price that makes outfitting your entire home feasible.
Check Today's PriceOur Testing Methodology
Detectors were tested using controlled smoke, steam, and cooking fume tests in a certified lab. We evaluated alert speed, phone notification reliability, false alarm handling, and interconnect performance.
Comparison Table
3 PRODUCTS COMPARED
← Scroll to compare →
| Product | Best For | Key Spec | Score | |
|---|---|---|---|---|
| Best Overall | Split-spectrum smoke + CO | 9/10 | View on Amazon | |
| Best for Apple Home | Photoelectric smoke + CO | 8.3/10 | View on Amazon | |
| Best Budget | Photoelectric smoke | 7.9/10 | View on Amazon |
Quick Summary
| # | Product | Best For | Score | |
|---|---|---|---|---|
| 1 | Google Nest Protect (2nd Gen) | Best Overall | 9/10 | Check Price → |
| 2 | First Alert Onelink Safe & Sound | Best for Apple Home | 8.3/10 | Check Price → |
| 3 | X-Sense XS01-M ProConnected | Best Budget | 7.9/10 | Check Price → |
Smart Smoke Detectors Reviews
3 PRODUCTS REVIEWED
Google Nest Protect (2nd Gen)
Best for: Smartest smoke and CO detection with phone alerts
Rated 9/10 by our testing team
The Nest Protect is still the best smart smoke detector you can buy. The split-spectrum sensor catches both fast-burning and smoldering fires, phone alerts include the room name and hazard type, and the pathlight guides you in the dark.
Why we like it
- Split-spectrum sensor catches all fire types
- Clear voice alerts tell you the room and hazard
- Pathlight feature doubles as a nightlight
Flaws
- Higher price than standard smart detectors
- Requires Google Home app and account
- Batteries are proprietary Nest specification
Prices checked Jun 18, 2026
First Alert Onelink Safe & Sound
Best for: HomeKit-native smoke detection with built-in speaker
The Onelink Safe & Sound is uniquely versatile with a built-in Alexa speaker and AirPlay 2 support. It is a smoke detector, smart speaker, and nightlight rolled into one ceiling-mounted device.
Why we like it
- Native HomeKit and AirPlay 2 support
- Built-in Alexa speaker for music and voice control
- Premium audio quality for a smoke detector
Flaws
- Hardwired installation only, no battery-only option
- Larger than standard smoke detectors
- Speaker adds complexity to a safety device
Prices checked Jun 18, 2026
X-Sense XS01-M ProConnected
Best for: Affordable interconnected smart smoke detection
The X-Sense XS01-M delivers smart features at a price that makes outfitting your entire home feasible. The 10-year sealed battery means true install-and-forget peace of mind with phone alerts.
Why we like it
- Very affordable for a smart smoke detector
- 10-year sealed battery, no replacements needed
- Wirelessly interconnects up to 6 detectors
Flaws
- No CO detection, smoke only
- No voice assistant integration
- Photoelectric only, no ionization sensor
Prices checked Jun 18, 2026
The Bottom Line
The Google Nest Protect remains the smartest smoke detector available with its split-spectrum sensor and pathlight feature. First Alert's Onelink is the best choice for Apple Home households.
Best Overall
Google Nest Protect (2nd Gen)
Our #1 recommendation — the best overall pick in this guide.
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BUYING GUIDE
Photoelectric vs Ionization vs Split-Spectrum
Photoelectric sensors detect smoldering fires faster. Ionization sensors catch fast-burning flames first. Split-spectrum sensors like Nest Protect handle both types effectively. For the best protection, choose split-spectrum or install both types.
Best Overall
Google Nest Protect (2nd Gen)
A great example of this in practice — check current price on Amazon.
Battery vs Hardwired
Hardwired detectors with battery backup are more reliable since they interconnect through your home's wiring. Battery-only detectors are easier to install and work during power outages. Smart detectors with wireless interconnect offer the best of both worlds.
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