Live nowPrime Day 2026October 6 to 7, 2026Ends in--d--h--m--sSee the deals
Water Leak Sensors · Head to head

Kidde WiFi Water Leak & Freeze Detector vs Shelly Flood

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Kidde and Shelly sites.
2026 verdict
The Kidde WiFi Water Leak & Freeze Detector gets the nod over the Shelly Flood for most homes, because it is cheaper, better reviewed and it can sound an alarm on the spot.
Kidde WiFi Water Leak & Freeze Detector
Winner
Kidde WiFi Water Leak & Freeze Detector
$23.69$34.9732% OFF

Last recorded price

Buy on Amazon USA
It joins Wi-Fi with no hub and covers water, temperature and freezing pipes, where the Shelly Flood relies on app notifications and ships without its battery. The Shelly Flood answers with a two-year warranty, a browser setup that needs no app and Samsung SmartThings support on top of Google Home and Home Assistant. Pick the Kidde for a loud, low-cost sensor, and the Shelly if you want the no-app setup and the longer warranty.
vs
Shelly Flood
Shelly

Shelly Flood

Prime exclusive deal
Lowest price of the last 6 months
12% above its lowest price of the last 6 months (€23.90)

Last recorded priceFeb 6, 2026$24.99

Currently unavailable on Amazon USA
See on Amazon USA
Deals by email

Water Leak Sensor prices change while you decide

We follow prices across the catalog and email you the best deals we find.

Smart home deals and news, straight to your inbox

Price drops, new releases and the smart home news worth knowing.

No spam. Unsubscribe in one click.

Your subscription could not be saved. Please try again.
Please enter a valid email address.
Your subscription has been successful.
FeatureKidde WiFi Water Leak & Freeze DetectorShelly FloodWinner
Rating4.03.8Kidde WiFi Water Leak & Freeze Detector
Warranty1 year2 yearsShelly Flood
IntegrationsGoogle Home, Home AssistantGoogle Home, Samsung SmartThings, Home AssistantShelly Flood
On Device Alert SoundYESNOKidde WiFi Water Leak & Freeze Detector
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsTie

What the differences mean

Local alarm

The Kidde has an alert sound built into the unit. The Shelly Flood has neither a sound nor a light, so every warning reaches you only through the app or your hub.

Setup

The Shelly configures from a phone browser with no app, creating its own setup network, and is picked up automatically by Home Assistant. The Kidde uses the Kidde app and a QR code.

Warranty

The Shelly Flood carries a two-year warranty, twice the Kidde's single year.

Ecosystem

The Shelly works with Google Home, Samsung SmartThings and Home Assistant. The Kidde works with Google Home and Home Assistant but not SmartThings, HomeKit or Matter.

Battery

The Shelly Flood runs about a year and a half on a CR123A cell that is not included in the box. The Kidde uses two AA cells with no documented runtime.

Price

The Kidde is the cheaper of the pair, and it also includes its batteries, so the gap is wider than it first looks.

Which one to buy if

Shelly

Shelly Flood

Prime exclusive deal

Last recorded priceFeb 6, 2026$24.99

Currently unavailable on Amazon USA
See on Amazon USA
  • + Warranty: 2 years
  • + Integrations: Google Home, Samsung SmartThings, Home Assistant
  • - Rating: 3.8 vs 4.0
  • - On Device Alert Sound: NO vs YES

What owners say

Owners of both sensors describe an inexpensive way to scatter leak coverage, and they agree the app or hub is where the warning arrives. Kidde WiFi Water Leak & Freeze Detector owners value the hub-free setup and a freeze alert for pipes, and their recurring gripes are Wi-Fi pairing, a difficult battery compartment and a temperature reading that refreshes only every twelve hours. Shelly Flood owners, many of them on Home Assistant, like the no-app browser setup, automatic pickup by Home Assistant and the low price; their warnings are units that drop off Wi-Fi and need manual reconnecting, first-time pairing that can take a few tries, the CR123A battery not being included and the absence of Apple HomeKit or Matter.

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.

  • Kidde WiFi Water Leak & Freeze Detector
  • Shelly Flood

Loading price history...

Frequently Asked Questions

Which is better overall: Kidde WiFi Water Leak & Freeze Detector or Shelly Flood?

The Kidde WiFi Water Leak & Freeze Detector for most homes, on price and its on-device alarm. It covers water, temperature and freezing pipes over plain Wi-Fi. The Shelly Flood is the better pick if you want a no-app browser setup, SmartThings support and a two-year warranty.

What is the biggest difference between the Kidde WiFi Water Leak & Freeze Detector and the Shelly Flood?

The alarm and the setup. The Kidde WiFi Water Leak & Freeze Detector sounds its own alert and uses the Kidde app, while the Shelly Flood has no sound or light, sets up from a browser and is picked up automatically by Home Assistant.

Does the Shelly Flood have a local alarm?

No. It has neither an on-device alert sound nor a light, so notifications arrive through the app or your hub.

Does the Kidde WiFi Water Leak & Freeze Detector work with SmartThings?

No. It supports Google Home and Home Assistant, with no SmartThings, Apple HomeKit or Matter.

Do both detect freezing pipes?

Yes. The Kidde WiFi Water Leak & Freeze Detector and the Shelly Flood both have a temperature sensor and raise freeze and temperature alerts, plus low-battery alerts.

Who should buy the Kidde WiFi Water Leak & Freeze Detector?

Anyone without a hub who wants a low-cost Wi-Fi sensor with its own alarm that catches leaks and freezing pipes.

Who should buy the Shelly Flood?

A Home Assistant or SmartThings user who wants a cheap Wi-Fi sensor set up from a browser and does not need a local siren.

Full comparison table

Compare all 34 Water Leak Sensors side by side

You are looking at two of them. The full table lines up all Water Leak Sensors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.

  • 34 Water Leak Sensors
  • 36 specs compared
  • 33 filters
Open the full comparison
More Water Leak Sensors

Top Water Leak Sensors to compare next

34 water leak sensors from 22 brands compared: Aqara, Aeotec, Shelly, Govee and more. Probe types, battery life, alarm volume and protocols.

All Water Leak Sensors
Kidde

More Kidde products

A sharper look at other Kidde products worth comparing.

Explore Kidde
Shelly

More Shelly products

A sharper look at other Shelly products worth comparing.

Explore Shelly
Independent · Not sponsoredBrands never pay for placement or rankings. Affiliate commissions never influence our comparisons.
© 2026 Smart Home Compared
Search