Head-to-head · Best Water Leak Detectors

Shelly Flood Gen4 vs SwitchBot Wi-Fi Leak Detector

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

SwitchBot Wi-Fi Leak Detector comes out ahead by a clear margin (4.5 vs 3.4). SwitchBot Wi-Fi Leak Detector is best for: sensitive leak detection with smart automation. Read the strengths below before deciding.

Ranked #6 in Best Water Leak Detectors

Shelly Flood Gen4

3.4

3 sources$39.99as of Oct 20

The Shelly Flood Gen4 is a smart water leak sensor designed for early detection of water leaks, sending real-time alerts to your phone and triggering a built-in alarm. It supports multiple protocols including Wi-Fi, Zigbee, Matter, and Bluetooth, and integrates with major smart home platforms like Alexa, Google Home, and Apple HomeKit. YouTube reviewer TecTimmy noted its effectiveness for early flood detection in coastal areas, while PCMag praised its expandable coverage capabilities. It's best suited for users seeking a budget-friendly, expandable leak detection solution, though it requires a smart home network for full functionality.

Strengths

— Detects water leaks in real-time and sends alerts to your phone
— Built-in alarm for immediate local notification of leaks
— Supports multiple smart home protocols including Wi-Fi, Zigbee, Matter, and Bluetooth

Watch-outs

— Requires Wi-Fi or Zigbee network for full functionality

$39.99 · Check Price on Amazon Full review →

Higher ratedRanked #1 in Best Water Leak Detectors

SwitchBot Wi-Fi Leak Detector

4.5

1 sourceall derived$16.99as of Oct 20

The SwitchBot Wi-Fi Leak Detector is a battery-operated, app-connected device designed to sense water and provide alerts via push notifications and email. Reviewers praised its remarkable sensitivity for detecting even small amounts of water and its dual leak/dry alert functionality with an optional cable. The device offers robust automation features including integration with Google Assistant, Amazon Alexa, IFTTT, and Siri Shortcuts. The compact, IP67-rated design includes a satisfying pop-open battery cover and comes with two AAA batteries that should last about two years. However, the device requires a 2.4GHz Wi-Fi network and battery life can fall short of the rated two years when alerts fire frequently.

Strengths

— Detects water with remarkable sensitivity, even with just a few drops bridging the sensor pins, per The Gadgeteer
— Provides both leak and dry alerts with optional cable for monitoring water levels
— App-connected with robust automation features including location-based triggers and integration with Google Assistant, Amazon Alexa, IFTTT, and Siri Shortcuts, according to The Gadgeteer

Watch-outs

— Requires 2.4GHz Wi-Fi network for operation, which may not be available in all homes, per the Spectrum Geeks YouTube review

$16.99 · Check Price on Amazon Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Shelly Flood Gen4

The Shelly Flood Gen4 supports Wi-Fi, Zigbee, Matter and Bluetooth, where the First Alert L1 Wi-Fi Water Leak and Freeze Detector lists Wi-Fi and the Aqara Water Leak Sensor lists Zigbee. It has a built-in alarm, which the First Alert L1's entry says that model lacks, and its sensor cable can be extended up to 150m from the 2m supplied. Its IP44 rating is lower than the IP67 of the Aqara and the SwitchBot Wi-Fi Leak Detector.

SwitchBot Wi-Fi Leak Detector

The SwitchBot Wi-Fi Leak Detector connects over 2.4GHz Wi-Fi, where the Aqara Water Leak Sensor requires an Aqara hub and the Eufy Water and Freeze Sensor a Eufy HomeBase. It matches the Aqara's IP67 rating and roughly two-year battery estimate, using two AAA batteries instead of a CR2032. Its automation support covers Google Assistant, Amazon Alexa, IFTTT and Siri Shortcuts, while the Aqara's HomeKit integration only displays alerts.

Specs side-by-side

Spec	Shelly Flood Gen4	SwitchBot Wi-Fi Leak Detector
Connectivity	Wi-Fi, Zigbee, Matter, Bluetooth	Wi-Fi 2.4GHz, Bluetooth 4.2
Alarm Type	Real-time phone alerts and built-in alarm	100dB
Detection Method	When water touches a sensor	electrodes
Water Resistance	IP44	IP67
Sensor Type	Water leak detection	Water leak detector
Power Source	Battery powered (battery included)	2xAAA batteries
Dimensions	97x76x25 mm	78 x 29 x 32 mm (3.1 x 11 x 1.3in)
Material	Plastic	—

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