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Water Leak Sensors · Head to head

Moen Smart Leak Detector vs Shelly Flood Gen4

Full Smart Water Leak Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Moen and Shelly sites.
2026 verdict
Matter, Zigbee and Wi-Fi on one flood sensor: the Shelly Flood Gen4 is the better overall water leak sensor, winning on price, owner rating, a 3-year warranty, connectivity and integrations.
Shelly Flood Gen4
Winner
Shelly Flood Gen4
$39.99
Buy on Amazon USACheck price
It speaks Wi-Fi, Zigbee, Matter, Google Home, Alexa, HomeKit, SmartThings and Home Assistant, and it still watches temperature with a sensing cable. The Moen Smart Leak Detector only takes IP67 weather resistance. Pick the Shelly Flood Gen4 for the widest protocol list; pick the Moen Smart Leak Detector if you want a tougher IP67 body and do not need Matter.
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FeatureMoen Smart Leak DetectorShelly Flood Gen4Winner
Price$51.00$39.99Shelly Flood Gen4
Rating3.34.2Shelly Flood Gen4
Warranty1 year3 yearsShelly Flood Gen4
Weather ResistanceIP67IP44Moen Smart Leak Detector
Connectivity2.4 GHz WiFi2.4 GHz WiFi, Bluetooth, ZigbeeShelly Flood Gen4
IntegrationsAlexa, Home AssistantGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterShelly Flood Gen4
Battery Life2 years2 yearsTie
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsTie
On Device Alert SoundYESYESTie
On Device Alert LightYESYESTie

Frequently Asked Questions

Which is better overall: Moen Smart Leak Detector or Shelly Flood Gen4?

The Shelly Flood Gen4 is the better overall water leak sensor. It wins on price, rating, warranty, connectivity and integrations. The Moen Smart Leak Detector wins on weather resistance.

Does the Shelly Flood Gen4 support Matter?

Yes. The Shelly Flood Gen4 supports Matter as well as Wi-Fi and Zigbee, plus Google Home, Alexa, HomeKit, SmartThings and Home Assistant. The Moen Smart Leak Detector has no Matter and no HomeKit.

Which sensor is more weather resistant?

The Moen Smart Leak Detector is IP67. The Shelly Flood Gen4 is IP44.

Who should buy the Shelly Flood Gen4?

Buy the Shelly Flood Gen4 for a leak-and-temperature sensor with Matter, Zigbee, Wi-Fi, a 3-year warranty, a sensing cable and a local siren.

Who should buy the Moen Smart Leak Detector?

Buy the Moen Smart Leak Detector if you want an IP67 Wi-Fi leak and freeze sensor with Alexa and do not need Matter or HomeKit.

Full comparison table

Compare all 33 Water Leak Sensors side by side

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  • 36 specs compared
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