Smoke & CO Detectors · Head to head

Heiman Matter Smoke Detector S1-M vs Shelly Plus Smoke Alarm

Full Smart Smoke & CO Detectors comparison in 2026

Data from Amazon and official Heiman and Shelly sites.
2026 verdict
Between Heiman Matter Smoke Detector S1-M and Shelly Plus Smoke Alarm, Heiman Matter Smoke Detector S1-M is the better overall pick in 2026, leading on price, integrations, and tests itself.
Heiman Matter Smoke Detector S1-M
Winner
Heiman Matter Smoke Detector S1-M
$39.99

Last recorded price

Buy on Amazon USA
It has the clearer edge on price, integrations, and tests itself, and it stays ahead on steam check. Pick Shelly Plus Smoke Alarm only when rating, connectivity, and Built-in light are the deciding factor for your setup. In practical terms, Heiman Matter Smoke Detector S1-M is the easier product to recommend.
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FeatureHeiman Matter Smoke Detector S1-MShelly Plus Smoke AlarmWinner
Price$39.99€52.54Heiman Matter Smoke Detector S1-M
Rating3.64.3Shelly Plus Smoke Alarm
ConnectivityThread Protocol2.4 GHz WiFi, BluetoothShelly Plus Smoke Alarm
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Samsung SmartThings, Home AssistantHeiman Matter Smoke Detector S1-M
Built-in LightNOYESShelly Plus Smoke Alarm
Tests ItselfYESNOHeiman Matter Smoke Detector S1-M
Steam CheckYESNOHeiman Matter Smoke Detector S1-M
Battery Life5 years5 yearsTie
ScreenNONOTie
SensorsSmokeSmokeTie
AlertsFire Alerts, Low Battery AlertsFire Alerts, Low Battery AlertsTie
Built-in SirenYESYESTie
Winner
Heiman

Heiman Matter Smoke Detector S1-M

Prime exclusive deal
$39.99

Last recorded price

Buy on Amazon USA
  • + Price: $39.99
  • + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • + Tests Itself: YES
  • - Rating: 3.6 vs 4.3
  • - Connectivity: Thread Protocol vs 2.4 GHz WiFi, Bluetooth
Shelly

Shelly Plus Smoke Alarm

12% OFF
Prime exclusive deal
€52.54
€59.99

Last recorded price

Buy on Amazon Italy
  • + Rating: 4.3
  • + Connectivity: 2.4 GHz WiFi, Bluetooth
  • + Built-in Light: YES
  • - Price: €52.54 vs $39.99
  • - Integrations: Google Home, Samsung SmartThings, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Heiman Matter Smoke Detector S1-M
  • Shelly Plus Smoke Alarm

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Frequently Asked Questions

Which is better overall: Heiman Matter Smoke Detector S1-M or Shelly Plus Smoke Alarm?

Heiman Matter Smoke Detector S1-M has the stronger overall profile in this comparison, especially for price, integrations, and tests itself.

What is the biggest difference between Heiman Matter Smoke Detector S1-M and Shelly Plus Smoke Alarm?

Price is one of the clearest differences: Heiman Matter Smoke Detector S1-M lists $39.99, while Shelly Plus Smoke Alarm lists €52.54.

Which one looks better on price?

Heiman Matter Smoke Detector S1-M is listed at $39.99, while Shelly Plus Smoke Alarm is listed at €52.54. Heiman Matter Smoke Detector S1-M (better spec).

Who should buy Heiman Matter Smoke Detector S1-M?

Choose Heiman Matter Smoke Detector S1-M if your priority is price and integrations and that matters more than rating.

Who should buy Shelly Plus Smoke Alarm?

Choose Shelly Plus Smoke Alarm if your priority is rating and connectivity and that matters more than price.

Full comparison table

Compare all 25 Smoke & CO Detectors side by side

You are looking at two of them. The full table lines up all Smoke & CO Detectors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.

  • 25 Smoke & CO Detectors
  • 44 specs compared
  • 41 filters
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