First Alert SMCO410 Smoke Detector & CO Alarm vs Google Nest Protect (Wired)

In 2026, the recommendation leans toward Google Nest Protect (Wired) over First Alert SMCO410 Smoke Detector & CO Alarm, driven by rating, connectivity, and integrations. Its clearest strengths are rating, connectivity, and integrations, and it still looks stronger on sensors and built-in light. First Alert SMCO410 Smoke Detector & CO Alarm is still relevant if you care most about price and warranty, but Google Nest Protect (Wired) is the stronger recommendation overall. That is why the final call still favors Google Nest Protect (Wired).