Water Leak Sensors · Head to head

Shelly Flood vs Sonoff Zigbee Water Leak Sensor

Full Smart Water Leak Sensors comparison in 2026

Data from Amazon and official Shelly and Sonoff sites.
2026 verdict
Both sit on a floor and wait for water, yet the Sonoff Zigbee Water Leak Sensor is the longer-lived Zigbee pick.
Sonoff Zigbee Water Leak Sensor
Winner
Sonoff Zigbee Water Leak Sensor

Last recorded priceJan 1, 2026$14.99

Currently unavailable on Amazon USA
See on Amazon USA
It is rated for 5 years on a CR2477 cell, the body is IP67, and Apple Home and Matter work when a SONOFF hub is already installed, beside Google Home, SmartThings and Home Assistant. The Shelly Flood carries a 2-year warranty, reads temperature, sends freeze alerts, and joins 2.4 GHz Wi-Fi with no hub, including Google Home, SmartThings and Home Assistant. Apple Home and Matter are not supported on it, and the cell is rated for 1.5 years. Choose the Sonoff Zigbee Water Leak Sensor for a Zigbee house that wants rare battery changes. Choose the Shelly Flood when the sensor should use Wi-Fi and also warn about freezing pipes.
Shelly Flood
Shelly

Shelly Flood

Prime exclusive deal
Lowest price of the last 6 months
13% above its lowest price of the last 6 months (€23.90)

Last recorded priceFeb 6, 2026$24.99

Currently unavailable on Amazon USA
See on Amazon USA
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FeatureShelly FloodSonoff Zigbee Water Leak SensorWinner
Rating3.84.3Sonoff Zigbee Water Leak Sensor
Warranty2 years1 yearShelly Flood
Battery Life1.5 years5 yearsSonoff Zigbee Water Leak Sensor
IntegrationsGoogle Home, Samsung SmartThings, Home AssistantGoogle Home, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterSonoff Zigbee Water Leak Sensor
SensorsWater Leak, TemperatureWater LeakShelly Flood
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsWater Leak Alerts, Low Battery AlertsShelly Flood
Connectivity2.4 GHz WiFiZigbeeTie
On Device Alert SoundNONOTie
On Device Alert LightNONOTie

What the differences mean

Radio and hub

The Shelly Flood joins 2.4 GHz Wi-Fi on its own, so there is no hub to buy. The Sonoff Zigbee Water Leak Sensor has no Wi-Fi radio and needs a Zigbee hub before it can report anything. That is the split between a sensor you add to an ordinary router and one that belongs on a Zigbee network you already run.

Battery span

The Shelly Flood is rated for 1.5 years on one CR123A, and that cell is not in the box. The Sonoff Zigbee Water Leak Sensor is rated for 5 years on a CR2477. If the puck will sit under a sink you rarely open, the longer rating is the one that changes the chore.

Temperature and freeze

The Shelly Flood reads temperature and can send temperature and freeze alerts, so the same puck can watch a cold pipe. The Sonoff Zigbee Water Leak Sensor is leak-only: temperature, temperature alerts and freeze alerts are all unsupported. A freeze warning is a reason to keep the Shelly even when Zigbee is available.

Apple Home, Matter, warranty

Apple Home and Matter are not supported on the Shelly Flood. The Sonoff Zigbee Water Leak Sensor supports both, but only with a SONOFF hub. Google Home, SmartThings and Home Assistant are on both, and neither supports Alexa. The Shelly warranty is 2 years against 1 year on the Sonoff.

Which one to buy if

Shelly

Shelly Flood

Prime exclusive deal

Last recorded priceFeb 6, 2026$24.99

Currently unavailable on Amazon USA
See on Amazon USA
  • + Warranty: 2 years
  • + Sensors: Water Leak, Temperature
  • + Alerts: Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts
  • - Rating: 3.8 vs 4.3
  • - Battery Life: 1.5 years vs 5 years
Winner
Sonoff

Sonoff Zigbee Water Leak Sensor

Prime exclusive deal

Last recorded priceJan 1, 2026$14.99

Currently unavailable on Amazon USA
See on Amazon USA
  • + Rating: 4.3
  • + Battery Life: 5 years
  • + Integrations: Google Home, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • - Warranty: 1 year vs 2 years
  • - Sensors: Water Leak vs Water Leak, Temperature

What owners say

Owners of both describe inexpensive sensors they will place at several water spots, and both groups talk first about Home Assistant. Shelly Flood owners single out setup from a phone browser, with no app required, and they like that temperature shows up with the leak reading once Home Assistant finds the device. Their complaints are about Wi-Fi: pairing can take several attempts, and some units drop offline and need a manual reconnect. Sonoff Zigbee Water Leak Sensor owners instead praise pairing that finishes quickly on Home Assistant and Hubitat, including routines that can close a shutoff valve, plus a sealed housing and a battery door that opens without tools. What they complain about is Samsung SmartThings, where several had to force the sensor to pair, and the lack of any sound or light on the unit, so an alert exists only if the hub sends one.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Shelly Flood
  • Sonoff Zigbee Water Leak Sensor

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Frequently Asked Questions

Which is better overall: Shelly Flood or Sonoff Zigbee Water Leak Sensor?

The Sonoff Zigbee Water Leak Sensor, when a Zigbee hub is already there. It is rated for 5 years, the body is IP67, and Apple Home and Matter work with a SONOFF hub. The Shelly Flood is the better fit on plain Wi-Fi, with temperature, freeze alerts and a 2-year warranty.

What is the biggest difference between the Shelly Flood and the Sonoff Zigbee Water Leak Sensor?

How they join the network. The Shelly Flood uses 2.4 GHz Wi-Fi with no hub. The Sonoff Zigbee Water Leak Sensor needs a Zigbee hub and has no Wi-Fi radio. Battery rating follows from that: 1.5 years on a CR123A against 5 years on a CR2477.

Does the Shelly Flood or the Sonoff Zigbee Water Leak Sensor sense temperature?

Only the Shelly Flood. It reads temperature and supports temperature and freeze alerts. The Sonoff Zigbee Water Leak Sensor is a leak sensor only, with no temperature reading and no freeze alert.

Do the Shelly Flood and the Sonoff Zigbee Water Leak Sensor work with Apple Home or Matter?

The Sonoff Zigbee Water Leak Sensor supports Apple Home and Matter only when a SONOFF hub is installed. The Shelly Flood supports neither. Both work with Google Home, SmartThings and Home Assistant, and neither supports Alexa.

Who should buy the Shelly Flood?

Buy the Shelly Flood for a Wi-Fi leak and freeze sensor with no hub, a 2-year warranty and Home Assistant or Google Home. Skip it if you need Apple Home, Matter or a local siren, which it does not have.

Who should buy the Sonoff Zigbee Water Leak Sensor?

Buy the Sonoff Zigbee Water Leak Sensor when Zigbee is already running and a 5-year rating plus an IP67 body matter more than temperature. It has no on-device sound or light, so the hub has to deliver the alert.

Full comparison table

Compare all 34 Water Leak Sensors side by side

You are looking at two of them. The full table lines up all Water Leak Sensors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.

  • 34 Water Leak Sensors
  • 36 specs compared
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