Water Leak Sensors · Head to head

Eufy Water and Freeze Sensor vs Shelly Flood

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Eufy and Shelly sites.
2026 verdict
No HomeBase in the house? The Shelly Flood is the better water leak sensor of these two, joining your Wi-Fi directly and reporting to Google Home, SmartThings and Home Assistant.
Shelly Flood
Winner
Shelly Flood

Last recorded priceFeb 6, 2026$24.99

Currently unavailable on Amazon USA
See on Amazon USA
It also sends general temperature alerts and low battery alerts on top of leak and freeze warnings, and carries a 2-year warranty against 1 year. The Eufy Water and Freeze Sensor is the better reviewed of the pair, is sealed to IP65 and runs up to 2 years on its CR123 cell against 1.5 years, but it only works through a Eufy HomeBase and reaches no platform other than Home Assistant through a community integration. Neither has a siren or light on the sensor itself. Pick the Shelly Flood for a mixed smart home, and the Eufy Water and Freeze Sensor only if a Eufy HomeBase already runs your cameras.
vs
Winner
Shelly Flood
Shelly

Shelly Flood

Prime exclusive deal
Lowest price of the last 6 months
10% 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
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FeatureEufy Water and Freeze SensorShelly FloodWinner
Rating4.53.8Eufy Water and Freeze Sensor
Warranty1 year2 yearsShelly Flood
Battery Life2 years1.5 yearsEufy Water and Freeze Sensor
IntegrationsHome AssistantGoogle Home, Samsung SmartThings, Home AssistantShelly Flood
AlertsWater Leak Alerts, Freeze Temperature AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsShelly Flood
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
On Device Alert SoundNONOTie
On Device Alert LightNONOTie

What the differences mean

What it connects to

The Shelly Flood joins 2.4 GHz Wi-Fi by itself, so nothing else has to be bought. The Eufy Water and Freeze Sensor talks to a Eufy HomeBase over its own radio and does nothing without one, which is only free if you already own Eufy cameras on a HomeBase.

Smart home platforms

The Shelly Flood works with Google Home, SmartThings and Home Assistant, so a leak can drive routines elsewhere. The Eufy Water and Freeze Sensor stays inside the Eufy app, with Home Assistant only through a community integration. Neither works with Apple Home or Matter.

Temperature alerts

Both carry a temperature sensor and warn before pipes freeze, but only the Shelly Flood also alerts on other temperature thresholds. The Eufy Water and Freeze Sensor limits its temperature sensor to freeze alerts.

Battery and sealing

The Eufy Water and Freeze Sensor is rated for 2 years on a CR123 and sealed to IP65. The Shelly Flood is rated for 1.5 years on a CR123A that is not in the box, and its weather resistance is not documented.

Which one to buy if

Eufy

Eufy Water and Freeze Sensor

Prime exclusive deal
$34.99

Last recorded price

Buy on Amazon USA
  • + Rating: 4.5
  • + Battery Life: 2 years
  • - Warranty: 1 year vs 2 years
  • - Integrations: Home Assistant vs Google Home, Samsung SmartThings, Home Assistant
Winner
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
  • + Alerts: Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts
  • - Rating: 3.8 vs 4.5
  • - Battery Life: 1.5 years vs 2 years

What owners say

Owners of both sensors agree on the basics: they react fast to water and are cheap enough to place near several water sources. Eufy Water and Freeze Sensor owners single out how sensitive it is, tripping on a couple of drops, and how easily it syncs into an existing HomeBase, but they complain that the base's alarm uses the same loud tone as Eufy's cameras, that pairing sometimes fails and that the HomeBase recording schedule can delay an alert. Shelly Flood owners talk instead about configuring it from a phone browser with no app and about Home Assistant picking it up on its own, while their complaints center on Wi-Fi: a first pairing that takes a few tries and units that drop off the network and need reconnecting.

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.

  • Eufy Water and Freeze Sensor
  • Shelly Flood

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Frequently Asked Questions

Which is better overall: Eufy Water and Freeze Sensor or Shelly Flood?

The Shelly Flood for most homes. It needs no base station, works with Google Home, SmartThings and Home Assistant, adds general temperature and low battery alerts and has a 2-year warranty. The Eufy Water and Freeze Sensor is the better reviewed of the two and the right choice only inside an existing Eufy HomeBase setup.

Does the Eufy Water and Freeze Sensor need a HomeBase?

Yes. The Eufy Water and Freeze Sensor has no Wi-Fi of its own: it links to a Eufy HomeBase over a Sub-1G radio, and the HomeBase carries the Wi-Fi connection. The Shelly Flood connects to 2.4 GHz Wi-Fi directly.

Do the Eufy Water and Freeze Sensor and the Shelly Flood both warn about freezing pipes?

Yes. Both carry a temperature sensor and send freeze alerts. The Shelly Flood also sends general temperature alerts, while the Eufy Water and Freeze Sensor uses its sensor for freeze warnings only.

Which smart home platforms do they work with?

The Shelly Flood works with Google Home, Samsung SmartThings and Home Assistant. The Eufy Water and Freeze Sensor works only with Home Assistant, through a community integration. Neither supports Apple Home, Matter or Alexa, which has no water leak device type.

Who should buy the Eufy Water and Freeze Sensor?

Households that already run Eufy Security cameras on a HomeBase and want leak and freeze alerts in the same app, with an IP65 sensor that runs up to 2 years per battery.

Who should buy the Shelly Flood?

Anyone without a hub who wants a Wi-Fi leak and temperature sensor that feeds Google Home, SmartThings or Home Assistant, and is comfortable with a Wi-Fi setup that can take a couple of tries.

Full comparison table

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