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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

Data from Amazon and 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 rating, integrations, and sensors.
Heiman Matter Smoke Detector S1-TM
Winner
Heiman Matter Smoke Detector S1-TM
$49.98
Buy on Amazon USACheck price
Its biggest wins come from rating, integrations, and sensors, and tests itself and steam check add more confidence to the verdict. Shelly Plus Smoke Alarm remains a niche alternative if price, battery life, and connectivity 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$49.98€39.95Shelly Plus Smoke Alarm
Rating5.04.4Heiman 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, Alexa, 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
ScreenNONOTie
AlertsFire Alerts, Low Battery AlertsFire Alerts, Low Battery AlertsTie
Built-in SirenYESYESTie
Shelly

Shelly Plus Smoke Alarm

25% OFF
€39.95
€53.43
Buy on Amazon GermanyCheck price
  • + Price: €39.95
  • + Battery Life: 5 years
  • + Connectivity: 2.4 GHz WiFi, Bluetooth
  • - Rating: 4.4 vs 5.0
  • - Integrations: Google Home, Alexa, 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 rating, 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 $49.98, while Shelly Plus Smoke Alarm lists €39.95.

Which one looks better on price?

Heiman Matter Smoke Detector S1-TM is listed at $49.98, while Shelly Plus Smoke Alarm is listed at €39.95. Shelly Plus Smoke Alarm (better spec).

Who should buy Heiman Matter Smoke Detector S1-TM?

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

Who should buy Shelly Plus Smoke Alarm?

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

Full comparison table

Compare all 24 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.

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