Winner
Updated November 2026
Data from the 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.
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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The biggest differences
Where these two are furthest apart, and by how much.
- Warranty+67%X-Sense Wi-Fi Water Leak Detector5 years vs 3 years
- Battery Life+50%X-Sense Wi-Fi Water Leak Detector3 years vs 2 years
| Feature | Shelly Flood Gen4 | X-Sense Wi-Fi Water Leak Detector | Winner |
|---|---|---|---|
| Price | $39.99 | $11.99 | X-Sense Wi-Fi Water Leak Detector |
| Rating | 4.1 | 4.5 | X-Sense Wi-Fi Water Leak Detector |
| Warranty | 3 years | 5 years | X-Sense Wi-Fi Water Leak Detector |
| Weather Resistance | IP44 | IP66 | X-Sense Wi-Fi Water Leak Detector |
| Battery Life | 2 years | 3 years | X-Sense Wi-Fi Water Leak Detector |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Zigbee | Other | Shelly Flood Gen4 |
| Integrations | Google Home, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Home Assistant | Shelly Flood Gen4 |
| Sensors | Water Leak, Temperature | Water Leak | Shelly Flood Gen4 |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | Water Leak Alerts, Low Battery Alerts | Shelly Flood Gen4 |
| On Device Alert Light | YES | NO | Shelly Flood Gen4 |
| On Device Alert Sound | YES | YES | Tie |
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
- your home runs on Matter, Apple Home or SmartThings
The Shelly Flood Gen4 supports all of them; the X-Sense works only with Home Assistant.
- pipes in an unheated space could freeze
Only the Shelly Flood Gen4 has a temperature sensor with freeze alerts.
- the sensor will sit on a floor that may flood
The X-Sense Wi-Fi Water Leak Detector is IP66; the Shelly body is only IP44.
- you want a simple leak alarm with the longest warranty
The X-Sense Wi-Fi Water Leak Detector comes with a 5-year warranty and a 3-year battery rating.
Winner
$39.99
- + 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: 4.1 vs 4.5
25% OFF
Prime exclusive deal$11.99
$15.99
- + Price: $11.99
- + Rating: 4.5
- + Warranty: 5 years
- - Connectivity: Other vs 2.4 GHz WiFi, Bluetooth, Zigbee
- - Integrations: Home Assistant vs Google Home, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
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.
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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