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Water Leak Sensors · Head to head

Eve Water Guard vs Sonoff Zigbee Water Leak Sensor

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Eve and Sonoff sites.
2026 verdict
For covering a whole appliance run rather than a single drip point, the Eve Water Guard is the stronger of these two water leak sensors, and the one with a real alarm on the unit.
Eve Water Guard
Winner
Eve Water Guard
$74.95$109.9532% OFFPrime exclusive deal
Buy on Amazon USACheck price
Its 6.5 ft sensing cable watches along its length and extends far beyond a spot sensor's reach, backed by a 100 dB siren and an alert light. The Sonoff Zigbee Water Leak Sensor counters on price and on the number of ecosystems it can join: Zigbee itself, then Google Home, SmartThings, Home Assistant, and Apple Home or Matter through a SONOFF bridge. It is also the tougher one at IP67 and runs about five years on a coin cell, but it makes no sound of its own and needs a hub. Pick the Eve Water Guard for HomeKit or Thread homes and long runs, and the Sonoff Zigbee Water Leak Sensor to sprinkle several cheap sensors across a Zigbee house.
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FeatureEve Water GuardSonoff Zigbee Water Leak SensorWinner
Price$74.95$14.99Sonoff Zigbee Water Leak Sensor
Rating4.54.3Eve Water Guard
ConnectivityBluetooth, Thread ProtocolZigbeeEve Water Guard
IntegrationsApple HomeKit, Home AssistantGoogle Home, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterSonoff Zigbee Water Leak Sensor
AlertsWater Leak AlertsWater Leak Alerts, Low Battery AlertsSonoff Zigbee Water Leak Sensor
On Device Alert SoundYESNOEve Water Guard
On Device Alert LightYESNOEve Water Guard
Weather ResistanceYESIP67Tie
Warranty1 year1 yearTie
SensorsWater LeakWater LeakTie

What the differences mean

How water is sensed

The Eve Water Guard senses along a 6.5 ft cable and can extend it far past that, so one unit can trace a whole run behind appliances. The Sonoff Zigbee Water Leak Sensor detects at its own contacts, with an optional sensing cable that is not in the box.

Local alarm

The Eve Water Guard sounds a 100 dB siren and blinks a light on the unit when water is found. The Sonoff Zigbee Water Leak Sensor has no on-device sound or light, so every warning depends on the hub and the app.

Hub requirement

The Sonoff Zigbee Water Leak Sensor needs a Zigbee hub, whether a SONOFF bridge, Home Assistant with a coordinator, or Hubitat. The Eve Water Guard needs no hub for HomeKit, only a Thread border router if you use its Thread path.

Power source

The Sonoff Zigbee Water Leak Sensor runs about five years on a CR2477 cell and can sit anywhere. The Eve Water Guard plugs into a wall outlet and never needs a battery, which limits where it can go.

Sealing

The Sonoff Zigbee Water Leak Sensor carries an IP67 rating with a gasket-sealed battery compartment, so it survives a soaking. The Eve Water Guard is listed as weather resistant without an IP figure, and it lives near an outlet anyway.

Reach into ecosystems

The Sonoff Zigbee Water Leak Sensor reaches Google Home, SmartThings and Home Assistant, and Apple Home or Matter through a SONOFF bridge. The Eve Water Guard is HomeKit, Thread and Home Assistant, with a Matter path still promised and no Alexa or Google Home.

Which one to buy if

Winner
Eve

Eve Water Guard

32% OFF
Prime exclusive deal
$74.95
$109.95
Buy on Amazon USACheck price
  • + Rating: 4.5
  • + Connectivity: Bluetooth, Thread Protocol
  • + On Device Alert Sound: YES
  • - Price: $74.95 vs $14.99
  • - Integrations: Apple HomeKit, Home Assistant vs Google Home, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter

What owners say

Owners of both sensors report that once they are paired, automations fire reliably enough to trigger a shutoff valve, so the difference is not there. Eve Water Guard owners stress the reliability of a HomeKit-native device with no manufacturer account, the siren and light catching a real leak, and the sensing cable that covers a whole run, while their complaints are the price and the constant wall power. Sonoff Zigbee Water Leak Sensor owners single out minute-fast pairing with Home Assistant and Hubitat and the low per-unit cost that makes several easy to justify, and they warn about SmartThings pairing friction, the absent on-device alarm and a coin cell that is a less common size to buy.

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.

  • Eve Water Guard
  • Sonoff Zigbee Water Leak Sensor

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Frequently Asked Questions

Which is better overall: Eve Water Guard or Sonoff Zigbee Water Leak Sensor?

For long-run coverage and a local alarm, the Eve Water Guard. For a Zigbee house that wants several cheap, sealed sensors, the Sonoff Zigbee Water Leak Sensor, which also reaches more ecosystems through a hub. The two suit different homes rather than one being better everywhere.

What is the biggest difference between the Eve Water Guard and the Sonoff Zigbee Water Leak Sensor?

The Eve Water Guard senses along a 6.5 ft cable and sounds a 100 dB alarm, while the Sonoff Zigbee Water Leak Sensor is a silent spot sensor with no on-device alert. That, plus the Eve's wired power against the Sonoff's coin cell, is the core split.

Do the Eve Water Guard and the Sonoff Zigbee Water Leak Sensor need a hub?

The Sonoff Zigbee Water Leak Sensor needs a Zigbee hub such as a SONOFF bridge, Home Assistant with a coordinator, or Hubitat. The Eve Water Guard needs no hub for Apple HomeKit, though its Thread path needs a Thread border router.

Does the Sonoff Zigbee Water Leak Sensor make a sound when it detects water?

No. The Sonoff Zigbee Water Leak Sensor has no on-device sound or light, so notifications and any siren come from the hub or from another device in an automation. The Eve Water Guard sounds its own 100 dB alarm.

Who should buy the Eve Water Guard?

Apple HomeKit or Thread households that need to watch a long appliance or pipe run from one unit, want a siren on the device, and do not mind wall power.

Who should buy the Sonoff Zigbee Water Leak Sensor?

Zigbee hub owners who want several inexpensive, watertight sensors placed around the house and are happy for the hub and app to handle every alert.

Full comparison table

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