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Water Leak Sensors · Head to head

Shelly Flood Gen4 vs X-Sense Wi-Fi Water Leak Detector

Full Smart Water Leak Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Shelly and X-Sense sites.
2026 verdict
For a smart home leak and freeze sensor, the Shelly Flood Gen4 is the more capable choice than the X-Sense Wi-Fi Water Leak Detector.
Shelly Flood Gen4
Winner
Shelly Flood Gen4
$39.99
Buy on Amazon USACheck price
It speaks Wi-Fi, Bluetooth and Zigbee, works with Matter, Apple Home, Google Home, SmartThings and Home Assistant, adds temperature and freeze alerts, and ships with a sensing cable that reaches under cabinets. The X-Sense Wi-Fi Water Leak Detector is the tougher, simpler device: IP66 against IP44, a 3-year battery rating against 2 and a 5-year warranty against 3, but it works only with Home Assistant, has no automations and watches only the spot where it sits. Take the Shelly Flood Gen4 if the sensor belongs in a connected home, and the X-Sense Wi-Fi Water Leak Detector if you want a durable standalone alarm with app alerts.
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FeatureShelly Flood Gen4X-Sense Wi-Fi Water Leak DetectorWinner
Price$39.99$11.99X-Sense Wi-Fi Water Leak Detector
Rating4.24.6X-Sense Wi-Fi Water Leak Detector
Warranty3 years5 yearsX-Sense Wi-Fi Water Leak Detector
Weather ResistanceIP44IP66X-Sense Wi-Fi Water Leak Detector
Battery Life2 years3 yearsX-Sense Wi-Fi Water Leak Detector
Connectivity2.4 GHz WiFi, Bluetooth, ZigbeeOtherShelly Flood Gen4
IntegrationsGoogle Home, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterHome AssistantShelly Flood Gen4
SensorsWater Leak, TemperatureWater LeakShelly Flood Gen4
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsWater Leak Alerts, Low Battery AlertsShelly Flood Gen4
On Device Alert LightYESNOShelly Flood Gen4
On Device Alert SoundYESYESTie

What the differences mean

Smart home platforms

The Shelly Flood Gen4 works with Matter, Apple Home, Google Home, SmartThings and Home Assistant. The X-Sense Wi-Fi Water Leak Detector works only with Home Assistant, so a leak cannot trigger a Google Home or Apple Home routine.

Freeze warnings

The Shelly Flood Gen4 measures temperature and sends temperature and freeze alerts, useful for pipes in a garage or crawlspace. The X-Sense Wi-Fi Water Leak Detector only detects water.

Sensing cable

The Shelly Flood Gen4 includes a sensing cable, so the unit can sit dry while the cable reaches under a cabinet or behind an appliance. The X-Sense Wi-Fi Water Leak Detector only detects water that reaches its own probes, four underneath and two on top.

Water protection

IP66 on the X-Sense Wi-Fi Water Leak Detector against IP44 on the Shelly Flood Gen4. The Shelly body is splash resistant, not built to sit in water, which is exactly why its cable does the wet work.

Battery and warranty

The X-Sense Wi-Fi Water Leak Detector runs 3 years on two AAA cells with a 5-year warranty. The Shelly Flood Gen4 runs 2 years on four AA cells with a 3-year warranty.

Which one to buy if

Winner
Shelly

Shelly Flood Gen4

$39.99
Buy on Amazon USACheck price
  • + Connectivity: 2.4 GHz WiFi, Bluetooth, Zigbee
  • + Integrations: Google Home, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • + Sensors: Water Leak, Temperature
  • - Price: $39.99 vs $11.99
  • - Rating: 4.2 vs 4.6

What owners say

Owners of both sensors bring up peace of mind first. Shelly Flood Gen4 owners, many of them on Home Assistant, single out stable Zigbee pairing, a cable sensitive enough to catch one drop, and local automations that cut an aquarium pump or flash lights red. X-Sense Wi-Fi Water Leak Detector owners talk about real saves around sump pumps and appliances, easy activation, a slim shape that fits behind a toilet and low-battery warnings in the app. Their complaints point to different things: Shelly owners describe slow Wi-Fi onboarding and Matter or HomeKit status that does not always refresh, while X-Sense owners mention a small printed manual and alerts that stay inside the X-Sense app unless Home Assistant pulls them in.

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 Gen4
  • X-Sense Wi-Fi Water Leak Detector

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Frequently Asked Questions

Which is better overall: Shelly Flood Gen4 or X-Sense Wi-Fi Water Leak Detector?

The Shelly Flood Gen4, for a smart home. It supports Wi-Fi, Bluetooth, Zigbee and Matter, adds freeze alerts and includes a sensing cable. The X-Sense Wi-Fi Water Leak Detector is better only if you want a rugged standalone alarm with a longer warranty.

Is the Shelly Flood Gen4 a good leak sensor?

Owners, especially on Home Assistant and Zigbee, describe the Shelly Flood Gen4 as fast and reliable, with a cable that reacts to a single drop. The weak spots they report are slow Wi-Fi onboarding and Matter status that does not always refresh in Apple Home.

Does the X-Sense Wi-Fi Water Leak Detector work with Alexa or Google Home?

No. The X-Sense Wi-Fi Water Leak Detector has no Alexa, Google Home, Apple Home, SmartThings or Matter support; it works with Home Assistant. The Shelly Flood Gen4 supports all of those platforms.

Which one is more waterproof?

The X-Sense Wi-Fi Water Leak Detector, rated IP66 against IP44 for the Shelly Flood Gen4. The Shelly relies on its included sensing cable to reach the wet spot while the unit itself stays dry.

Who should buy the Shelly Flood Gen4?

Smart home builders on Home Assistant, Zigbee or Matter who want leak and freeze alerts, local automations and a cable that reaches under cabinets.

Who should buy the X-Sense Wi-Fi Water Leak Detector?

Anyone who wants a durable Wi-Fi leak alarm around a water heater or sump pump, with app alerts, a 5-year warranty and no need for voice assistant routines.

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