Live nowPrime Day 2026October 6 to 7, 2026Starts in08d10h50m24sSee the deals
Water Leak Sensors · Head to head

Shelly Flood Gen4 vs YoLink Water Leak Sensor 4

Full Smart Water Leak Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Shelly and YoLink sites.
2026 verdict
Five years on two AAA cells against Matter on four radios: for set-and-forget leak protection, the YoLink Water Leak Sensor 4 wins this pairing.
YoLink Water Leak Sensor 4
Winner
YoLink Water Leak Sensor 4
$17.09$23.9929% OFF
Buy on Amazon USACheck price
It is rated for 5 years of battery life against 2, is IP66 rather than IP44, sounds a 105 dB siren even when its hub is offline, and is the better reviewed and lower priced of the two. The Shelly Flood Gen4 is the open one: it connects over Wi-Fi, Zigbee or Bluetooth with no vendor hub, supports Matter and so Google Home, Apple Home and SmartThings, includes a 2 m sensing cable and carries a 3-year warranty. Both send temperature and freeze alerts, flash a light and work with Home Assistant, while Alexa can only announce the YoLink's alerts through the YoLink skill. Choose the YoLink Water Leak Sensor 4 for garages, outbuildings and spots you never want to revisit, and the Shelly Flood Gen4 for a Matter, Apple Home or Google Home setup.
vs
Price alerts

Water Leak Sensor prices change while you decide

We check the price of every Water Leak Sensor in the catalog daily and email you the drops, whichever one you pick.

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.
FeatureShelly Flood Gen4YoLink Water Leak Sensor 4Winner
Price$39.99$17.09YoLink Water Leak Sensor 4
Rating4.24.7YoLink Water Leak Sensor 4
Warranty3 years2 yearsShelly Flood Gen4
Weather ResistanceIP44IP66YoLink Water Leak Sensor 4
Battery Life2 years5 yearsYoLink Water Leak Sensor 4
Connectivity2.4 GHz WiFi, Bluetooth, ZigbeeOtherShelly Flood Gen4
IntegrationsGoogle Home, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterHome AssistantShelly Flood Gen4
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
On Device Alert SoundYESYESTie
On Device Alert LightYESYESTie

What the differences mean

Battery life

The YoLink Water Leak Sensor 4 is rated for 5 years on two AAA cells; the Shelly Flood Gen4 for 2 years on four AA. Across a house full of sensors, that is years fewer battery rounds with the YoLink.

Hub and radios

The YoLink Water Leak Sensor 4 uses LoRa and needs a YoLink hub, which in return reaches garages and outbuildings. The Shelly Flood Gen4 joins Wi-Fi or a Zigbee network directly, with no vendor hub.

Smart home platforms

Both work with Home Assistant; Alexa can only announce the YoLink's alerts through the YoLink skill. The Shelly Flood Gen4 adds Google Home and, through Matter, Apple Home and SmartThings, none of which the YoLink Water Leak Sensor 4 supports.

Waterproofing

The YoLink Water Leak Sensor 4 is IP66 and handles a wet floor. The Shelly Flood Gen4 is IP44, protected against splashes, and puts its sensing cable in the wet spot instead.

Sensing cable and warranty

The Shelly Flood Gen4 includes a 2 m extendable sensing cable and a 3-year warranty. The YoLink Water Leak Sensor 4 senses only at the puck and has a 2-year warranty.

Which one to buy if

Shelly

Shelly Flood Gen4

$39.99
Buy on Amazon USACheck price
  • + Warranty: 3 years
  • + Connectivity: 2.4 GHz WiFi, Bluetooth, Zigbee
  • + Integrations: Google Home, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • - Price: $39.99 vs $17.09
  • - Rating: 4.2 vs 4.7

What owners say

Owners of both sensors praise a local alarm that does not depend on the phone and freeze warnings from the same device. YoLink Water Leak Sensor 4 owners single out long range across big properties, a siren that fires even if the hub or Wi-Fi is down, years on the batteries and real saves from water heaters and washing machine hoses, and a few found the app confusing to configure. Shelly Flood Gen4 owners talk about stable Zigbee pairing with Home Assistant, a cable sensitive to a single drop and on-device automations that switch other Shelly devices, while they complain about slow Wi-Fi onboarding and Apple Home status over Matter that did not always refresh.

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
  • YoLink Water Leak Sensor 4

Loading price history...

Frequently Asked Questions

Which is better overall: Shelly Flood Gen4 or YoLink Water Leak Sensor 4?

The YoLink Water Leak Sensor 4 for most homes. It lasts longer on its batteries, is more water resistant, keeps its siren working when the hub is offline and is the better reviewed of the two. The Shelly Flood Gen4 is better for Matter, Apple Home and Google Home users.

What is the biggest difference between the Shelly Flood Gen4 and the YoLink Water Leak Sensor 4?

Ecosystem. The Shelly Flood Gen4 is an open, multi-protocol sensor with Matter and no vendor hub, while the YoLink Water Leak Sensor 4 is a long-range LoRa sensor that needs a YoLink hub and works with Home Assistant.

Do both the Shelly Flood Gen4 and the YoLink Water Leak Sensor 4 warn about freezing?

Yes. Both the Shelly Flood Gen4 and the YoLink Water Leak Sensor 4 measure temperature and send freeze alerts, so either can watch an unheated space for frozen pipes as well as leaks.

Which has the longer battery life, the Shelly Flood Gen4 or the YoLink Water Leak Sensor 4?

The YoLink Water Leak Sensor 4, rated for about 5 years on two AAA batteries, against about 2 years on four AA batteries for the Shelly Flood Gen4.

Who should buy the Shelly Flood Gen4?

Matter, Apple Home and Google Home households, and Home Assistant users on Zigbee, who want a sensing cable and no dependence on a vendor hub.

Who should buy the YoLink Water Leak Sensor 4?

Owners of large homes and properties with outbuildings who want long range, very long battery life and a siren that works even when the internet is down.

Full comparison table

Compare all 33 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.

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

Top Water Leak Sensors to compare next

33 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
Shelly

More Shelly products

A sharper look at other Shelly products worth comparing.

Explore Shelly
YoLink

More YoLink products

A sharper look at other YoLink products worth comparing.

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