Heiman Matter Smoke Detector S1-M vs X-Sense WiFi Smoke & CO Detector

Data from Amazon and official Heiman and X-Sense sites.

2026 verdict

For most buyers in 2026, X-Sense WiFi Smoke & CO Detector is the safer pick over Heiman Matter Smoke Detector S1-M because of rating, screen, and sensors.

Winner

X-Sense WiFi Smoke & CO Detector

Buy on Amazon UK

Its biggest wins come from rating, screen, and sensors, and alerts and Built-in light add more confidence to the verdict. The only strong reason to choose Heiman Matter Smoke Detector S1-M is if integrations, tests itself, and steam check are more important to you than the overall verdict. In practical terms, X-Sense WiFi Smoke & CO Detector is the easier product to recommend.

Heiman

Heiman Matter Smoke Detector S1-M

$39.99

Buy on Amazon USA

Winner

X-Sense

X-Sense WiFi Smoke & CO Detector

Price unavailable right now

Buy on Amazon UK

Price alerts

Smoke & CO Detector prices change while you decide

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Feature	Heiman Matter Smoke Detector S1-M	X-Sense WiFi Smoke & CO Detector	Winner
Rating	3.6	4.5	X-Sense WiFi Smoke & CO Detector
Integrations	Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter	Home Assistant	Heiman Matter Smoke Detector S1-M
Screen	NO	YES	X-Sense WiFi Smoke & CO Detector
Sensors	Smoke	Smoke, CO	X-Sense WiFi Smoke & CO Detector
Alerts	Fire Alerts, Low Battery Alerts	Fire Alerts, CO Alerts, Low Battery Alerts	X-Sense WiFi Smoke & CO Detector
Built-in Light	NO	YES	X-Sense WiFi Smoke & CO Detector
Tests Itself	YES	NO	Heiman Matter Smoke Detector S1-M
Steam Check	YES	NO	Heiman Matter Smoke Detector S1-M
Connectivity	Thread Protocol	2.4 GHz WiFi	Tie
Built-in Siren	YES	YES	Tie
Pathlight	NO	NO	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
- Rating: 3.6 vs 4.5
- Screen: NO vs YES

Winner

X-Sense

X-Sense WiFi Smoke & CO Detector

Price unavailable right now

Buy on Amazon UK

+ Rating: 4.5
+ Screen: YES
+ Sensors: Smoke, CO
- Integrations: 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 X-Sense WiFi Smoke & CO Detector?

X-Sense WiFi Smoke & CO Detector has the stronger overall profile in this comparison, especially for rating, screen, and sensors.

What is the biggest difference between Heiman Matter Smoke Detector S1-M and X-Sense WiFi Smoke & CO Detector?

Rating is one of the clearest differences: Heiman Matter Smoke Detector S1-M lists 3.6, while X-Sense WiFi Smoke & CO Detector lists 4.5.

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 rating.

Who should buy X-Sense WiFi Smoke & CO Detector?

Choose X-Sense WiFi Smoke & CO Detector if your priority is rating and screen and that matters more than integrations.

Full comparison table

Compare all 19 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.