Aeotec Water Leak Sensor vs Shelly Flood Gen4 comparison

Updated July 2026

Data from Amazon and official Aeotec and Shelly sites.

2026 verdict

The Shelly Flood Gen4 is the more capable water leak sensor here and wins overall, pairing a 3-year warranty, weather resistance, and a longer battery with the broadest connectivity in this pair. It supports Wi-Fi, Bluetooth, Zigbee, and Matter and reaches Google Home, Alexa, Apple HomeKit, SmartThings, and Home Assistant, plus it adds a built-in buzzer and LED and an included 2 m sensor cable. The Aeotec Water Leak Sensor holds one clear edge, a higher owner rating, and it remains a clean, battery-friendly Zigbee sensor for SmartThings and Home Assistant homes with temperature and freeze alerts of its own. Buy the Shelly Flood Gen4 for maximum protocol flexibility, a local alarm, and cable-reachable placements; choose the Aeotec Water Leak Sensor if you want the higher-rated, simpler Zigbee sensor for a SmartThings or Home Assistant setup.

Feature	Aeotec Water Leak Sensor	Shelly Flood Gen4	Winner
Rating	4.5	4.2	Aeotec Water Leak Sensor
Warranty	1 year	3 years	Shelly Flood Gen4
Weather Resistance	IP20	IP44	Shelly Flood Gen4
Battery Life	1 year	2 years	Shelly Flood Gen4
Connectivity	Zigbee	2.4 GHz WiFi, Bluetooth, Zigbee	Shelly Flood Gen4
Integrations	Samsung SmartThings, Home Assistant	Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter	Shelly Flood Gen4
On Device Alert Sound	NO	YES	Shelly Flood Gen4
On Device Alert Light	NO	YES	Shelly Flood Gen4
Price	$39.99	$39.99	Tie
Sensors	Water Leak, Temperature	Water Leak, Temperature	Tie
Alerts	Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts	Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts	Tie

Aeotec

Aeotec Water Leak Sensor

$39.99

Buy on Amazon USA

+ Rating: 4.5
- Warranty: 1 year vs 3 years
- Weather Resistance: IP20 vs IP44

Winner

Shelly

Shelly Flood Gen4

$39.99

Buy on Amazon USA

+ Warranty: 3 years
+ Weather Resistance: IP44
+ Battery Life: 2 years
- Rating: 4.2 vs 4.5

Frequently Asked Questions

Which is better overall: Aeotec Water Leak Sensor or Shelly Flood Gen4?

The Shelly Flood Gen4 wins overall with a 3-year warranty, weather resistance, longer battery life, multi-protocol connectivity, a local alarm, and an included sensor cable. The Aeotec Water Leak Sensor still carries a higher owner rating.

What is the biggest difference between the Shelly Flood Gen4 and the Aeotec Water Leak Sensor?

Connectivity and onboard features. The Shelly Flood Gen4 supports Wi-Fi, Bluetooth, Zigbee, and Matter with a built-in buzzer, LED, and sensor cable, while the Aeotec Water Leak Sensor is a Zigbee-only sensor with no local alarm.

Which sensor works with more smart home platforms?

The Shelly Flood Gen4 does, reaching Google Home, Alexa, Apple HomeKit, SmartThings, and Home Assistant across several protocols including Matter. The Aeotec Water Leak Sensor connects only to SmartThings and Home Assistant over Zigbee.

Which one has a local alarm and a sensor cable?

The Shelly Flood Gen4 has a built-in buzzer and LED plus a 2 m extendable sensor cable. The Aeotec Water Leak Sensor has neither an onboard alarm nor a sensor cable.

Who should buy the Shelly Flood Gen4?

Buy it if you want protocol flexibility (Wi-Fi, Zigbee, Bluetooth, Matter), a local alarm, an extendable cable for tight spots, and a longer 3-year warranty.

Who should buy the Aeotec Water Leak Sensor?

Choose it if you run a Zigbee hub like SmartThings or Home Assistant and prefer a higher-rated, simpler sensor with temperature and freeze alerts.

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