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

Data from Amazon and official Heiman and Shelly sites.

2026 verdict

Between Shelly Plus Smoke Alarm and Heiman Matter Smoke Detector S1-M, Shelly Plus Smoke Alarm is the better overall pick in 2026, leading on price, rating, and connectivity.

Winner

Shelly Plus Smoke Alarm

€39.95€53.4325% OFF

Buy on Amazon Germany

It has the clearer edge on price, rating, and connectivity, and it stays ahead on Built-in light. Pick Heiman Matter Smoke Detector S1-M only when integrations, tests itself, and steam check are the deciding factor for your setup. In practical terms, Shelly Plus Smoke Alarm is the easier product to recommend.

Heiman

Heiman Matter Smoke Detector S1-M

$39.99

Buy on Amazon USA

Winner

Shelly

Shelly Plus Smoke Alarm

25% OFF

€39.95

€53.43

Buy on Amazon Germany

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Feature	Heiman Matter Smoke Detector S1-M	Shelly Plus Smoke Alarm	Winner
Price	$39.99	€39.95	Shelly Plus Smoke Alarm
Rating	3.6	4.4	Shelly Plus Smoke Alarm
Connectivity	Thread Protocol	2.4 GHz WiFi, Bluetooth	Shelly Plus Smoke Alarm
Integrations	Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter	Google Home, Alexa, Samsung SmartThings, Home Assistant	Heiman Matter Smoke Detector S1-M
Built-in Light	NO	YES	Shelly Plus Smoke Alarm
Tests Itself	YES	NO	Heiman Matter Smoke Detector S1-M
Steam Check	YES	NO	Heiman Matter Smoke Detector S1-M
Battery Life	5 years	5 years	Tie
Screen	NO	NO	Tie
Sensors	Smoke	Smoke	Tie
Alerts	Fire Alerts, Low Battery Alerts	Fire Alerts, Low Battery Alerts	Tie
Built-in Siren	YES	YES	Tie

Heiman

Heiman Matter Smoke Detector S1-M

$39.99

Buy on Amazon USA

+ Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
+ Tests Itself: YES
+ Steam Check: YES
- Price: $39.99 vs €39.95
- Rating: 3.6 vs 4.4

Winner

Shelly

Shelly Plus Smoke Alarm

25% OFF

€39.95

€53.43

Buy on Amazon Germany

+ Price: €39.95
+ Rating: 4.4
+ Connectivity: 2.4 GHz WiFi, Bluetooth
- Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- Tests Itself: NO vs YES

Frequently Asked Questions

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

Shelly Plus Smoke Alarm has the stronger overall profile in this comparison, especially for price, rating, and connectivity.

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 €39.95.

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 €39.95. Shelly Plus Smoke Alarm (better spec).

Who should buy Heiman Matter Smoke Detector S1-M?

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

Who should buy Shelly Plus Smoke Alarm?

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

Full comparison table

Compare all 19 Smoke & CO Detectors side by side

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