Question 1

Which is better, Google Nest Protect or First Alert SCO501CN?

Accepted Answer

Both products scored 8.5/10 in our testing — it's a tie. Choose based on which features matter most to you.

Question 2

Is the Google Nest Protect worth it over the First Alert SCO501CN?

Accepted Answer

The Google Nest Protect scores 8.5/10 while the First Alert SCO501CN scores 8.5/10. The Google Nest Protect is our "Best Smart" pick in the Best Smoke Detectors 2026 category.

Google Nest Protect vs First Alert SCO501CN: Which to Buy?