Which is better, Google Nest Protect or First Alert Onelink Safe & Sound?

Based on our trust score analysis, First Alert Onelink Safe & Sound scores 9.2/10 compared to Google Nest Protect at 9.0/10. First Alert Onelink Safe & Sound ranks higher across expert reviews, user sentiment, and value metrics, making it the stronger choice overall.

What is the price difference between Google Nest Protect and First Alert Onelink Safe & Sound?

Google Nest Protect is priced at $109.00 – $129.00 and First Alert Onelink Safe & Sound is priced at $199.00 – $249.00. First Alert Onelink Safe & Sound is the more expensive option at $199.00 – $249.00, while Google Nest Protect comes in at $109.00 – $129.00.

Is First Alert Onelink Safe & Sound worth the extra money over Google Nest Protect?

First Alert Onelink Safe & Sound ($199.00 – $249.00) has a value score of 8.7/10 compared to Google Nest Protect ($109.00 – $129.00) at 8.2/10. The higher price is justified by better performance across our trust metrics.

Home / Carbon Monoxide Detectors / Google Nest Protect vs First Alert Onelink Safe & Sound

Google Nest Protect vs First Alert Onelink Safe & Sound

Name: First Alert Onelink Safe & Sound
Brand: First Alert
Rating: 4.7 (1 reviews)

Head-to-head comparison based on trust scores, features, pricing, and real user feedback.

Our pick: First Alert Onelink Safe & Sound (Trust Score 9.2 vs 9.0)

Google Nest Protect

Google

$109.00 – $129.00

9.0

Excellent

Best Value

Pros

+Voice alerts name danger type and location
+Split-Spectrum dual sensing
+Phone notifications and remote silence
+Voice alerts with specific danger type
+Automatic self-testing

Cons

−Most expensive CO detector
−Premium price per unit
−Requires Google Home ecosystem
−No Thread or Matter support

Don't buy if

⚠ The Nest Protect has a 10-year sealed battery lifespan; it cannot be battery-replaced and the entire unit must be discarded after 10 years.
⚠ The Nest Protect cannot be silenced from older Nest apps; ensure you use the Google Home app for full functionality.

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First Alert Onelink Safe & Sound

First Alert

$199.00 – $249.00

9.2

Excellent

Runner-Up

Pros

+Built-in AirPlay 2 speaker
+Alexa voice assistant included
+HomeKit and Alexa integration

Cons

−Expensive for a smoke detector
−Large ceiling footprint

Don't buy if

⚠ The speaker quality is adequate but not comparable to dedicated smart speakers; manage expectations for music playback.

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Score Comparison

Metric	Google Nest Protect	First Alert Onelink Safe & Sound
Trust Score	9.0	9.2 ✓
Expert Score	8.8	9.2 ✓
User Sentiment	9.1	9.2 ✓
Value Score	8.2	8.7 ✓
Complaint Risk	8.7 ✓	8.8
Price	$109.00 – $129.00	$199.00 – $249.00

The Verdict

First Alert Onelink Safe & Sound wins this comparison with a Trust Score of 9.2 vs 9.0. It's rated "Runner-Up" and scores higher across the majority of our evaluation criteria. However, the Google Nest Protect may be a better fit depending on your specific priorities — check the pros and cons above.

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