Water Leak Sensors · Head to head

Moen Smart Leak Detector vs Shelly Flood

Full Smart Water Leak Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Moen and Shelly sites.
2026 verdict
A quieter first-gen Shelly loses the outdoor brief.
Moen Smart Leak Detector
Winner
Moen Smart Leak Detector
$51.00$54.877% OFF
Buy on Amazon USACheck price
The Moen Smart Leak Detector is the better overall water leak sensor, winning on weather resistance, 2-year battery life, an on-device siren and an alert light. It is IP67 with a local alarm. The Shelly Flood answers with a lower price, a better owner rating, a 2-year warranty and broader integrations (Google Home, Alexa, SmartThings, Home Assistant), plus temperature sensing, but it has no local siren and a shorter 1.5-year battery. Choose the Moen Smart Leak Detector for a waterproof puck that beeps; choose the Shelly Flood for cheaper Wi-Fi leak-and-temperature sensing in a wider smart-home list.
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FeatureMoen Smart Leak DetectorShelly FloodWinner
Price$51.00$24.99Shelly Flood
Rating3.33.8Shelly Flood
Warranty1 year2 yearsShelly Flood
Weather ResistanceIP67NOMoen Smart Leak Detector
Battery Life2 years1.5 yearsMoen Smart Leak Detector
IntegrationsAlexa, Home AssistantGoogle Home, Alexa, Samsung SmartThings, Home AssistantShelly Flood
On Device Alert SoundYESNOMoen Smart Leak Detector
On Device Alert LightYESNOMoen Smart Leak Detector
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsTie

Frequently Asked Questions

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

The Moen Smart Leak Detector is the better overall water leak sensor. It wins on weather resistance, battery life, on-device alert sound and on-device alert light. The Shelly Flood wins on price, rating, warranty and integrations.

Does the Shelly Flood have a local alarm?

No. The Shelly Flood has no on-device alert sound or light. The Moen Smart Leak Detector has both.

Which sensor lasts longer on a battery?

The Moen Smart Leak Detector is rated for 2 years on a CR123A. The Shelly Flood is rated for 1.5 years on a CR123A that is not included.

Who should buy the Moen Smart Leak Detector?

Buy the Moen Smart Leak Detector for IP67 Wi-Fi leak and freeze alerts with a local siren, an LED and a 2-year battery.

Who should buy the Shelly Flood?

Buy the Shelly Flood if you want a cheaper Wi-Fi leak-and-temperature sensor with Google Home, Alexa, SmartThings and Home Assistant.

Full comparison table

Compare all 32 Water Leak Sensors side by side

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