First Alert SC5 Hardwire Smart Smoke & CO Alarm vs Google Nest Protect (Wired)

Between Google Nest Protect (Wired) and First Alert SC5 Hardwire Smart Smoke & CO Alarm, Google Nest Protect (Wired) is the better overall pick in 2026, leading on rating, connectivity, and integrations. The comparison tilts its way because of rating, connectivity, and integrations, with sensors and built-in light keeping it in front. First Alert SC5 Hardwire Smart Smoke & CO Alarm can still be the right pick, but only if price and warranty outweighs the wider strengths of Google Nest Protect (Wired). That makes Google Nest Protect (Wired) the clearer recommendation in 2026.