Smoke & CO Detectors · Head to head

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

Full Smart Smoke & CO Detectors comparison in 2026

Updated November 2026
Data from the official Heiman and Shelly sites.
2026 verdict
Heiman Matter Smoke Detector S1-TM beats Shelly Plus Smoke Alarm in 2026, with its clearest edge on price, integrations, and sensors.
Heiman Matter Smoke Detector S1-TM
Winner
Heiman Matter Smoke Detector S1-TM
$44.98$49.9810% OFFPrime exclusive deal
Buy on Amazon USA
Its biggest wins come from price, integrations, and sensors, and tests itself and steam check add more confidence to the verdict. Shelly Plus Smoke Alarm remains a niche alternative if battery life, connectivity, and Built-in light matter more than the rest of the comparison. That is why the final call still favors Heiman Matter Smoke Detector S1-TM.
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FeatureHeiman Matter Smoke Detector S1-TMShelly Plus Smoke AlarmWinner
Price$44.98£64.81Heiman Matter Smoke Detector S1-TM
Battery Life3.5 years5 yearsShelly 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-TM
SensorsSmoke, Temperature, HumiditySmokeHeiman Matter Smoke Detector S1-TM
Built-in LightNOYESShelly Plus Smoke Alarm
Tests ItselfYESNOHeiman Matter Smoke Detector S1-TM
Steam CheckYESNOHeiman Matter Smoke Detector S1-TM
Rating4.44.4Tie
ScreenNONOTie
AlertsFire Alerts, Low Battery AlertsFire Alerts, Low Battery AlertsTie
Built-in SirenYESYESTie
Winner
Heiman

Heiman Matter Smoke Detector S1-TM

10% OFF
Prime exclusive deal
$44.98
$49.98
Buy on Amazon USA
  • + Price: $44.98
  • + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • + Sensors: Smoke, Temperature, Humidity
  • - Battery Life: 3.5 years vs 5 years
  • - Connectivity: Thread Protocol vs 2.4 GHz WiFi, Bluetooth
Shelly

Shelly Plus Smoke Alarm

7% OFF
Prime exclusive deal
£64.81
£69.74
Buy on Amazon UK
  • + Battery Life: 5 years
  • + Connectivity: 2.4 GHz WiFi, Bluetooth
  • + Built-in Light: YES
  • - Price: £64.81 vs $44.98
  • - Integrations: Google Home, Samsung SmartThings, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter

Frequently Asked Questions

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

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

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

Price is one of the clearest differences: Heiman Matter Smoke Detector S1-TM lists $44.98, while Shelly Plus Smoke Alarm lists £64.81.

Which one looks better on price?

Heiman Matter Smoke Detector S1-TM is listed at $44.98, while Shelly Plus Smoke Alarm is listed at £64.81. Heiman Matter Smoke Detector S1-TM (better spec).

Who should buy Heiman Matter Smoke Detector S1-TM?

Choose Heiman Matter Smoke Detector S1-TM if your priority is price and integrations and that matters more than battery life.

Who should buy Shelly Plus Smoke Alarm?

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

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