First Alert SC5 Hardwire Smart Smoke & CO Alarm vs Shelly Plus Smoke Alarm

Shelly Plus Smoke Alarm is the more complete option versus First Alert SC5 Hardwire Smart Smoke & CO Alarm in 2026, helped most by price, rating, and connectivity. The comparison tilts its way because of price, rating, and connectivity, with integrations 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 warranty, sensors, and alerts outweighs the wider strengths of Shelly Plus Smoke Alarm. In practical terms, Shelly Plus Smoke Alarm is the easier product to recommend.