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Water Leak Sensors · Head to head

Shelly Flood Gen4 vs SwitchBot Water Leak Detector

Full Smart Water Leak Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Shelly and SwitchBot sites.
2026 verdict
Buy the Shelly Flood Gen4 when one water leak sensor must speak Wi-Fi, Zigbee and Matter and still reach under a cabinet.
Shelly Flood Gen4
Winner
Shelly Flood Gen4
$39.99
Buy on Amazon USACheck price
It leads on a 3-year warranty, a 2 m probe cable, temperature and freeze alerts, plus Google Home, Apple Home, SmartThings, Home Assistant and Matter. The SwitchBot Water Leak Detector is the tighter seal, at IP67 against IP44, and it joins Wi-Fi and Bluetooth with its own siren and light and no hub. Both sound an alarm. Choose the Shelly Flood Gen4 for protocol range and a cable, and the SwitchBot Water Leak Detector when a small IP67 puck on plain Wi-Fi is enough.
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FeatureShelly Flood Gen4SwitchBot Water Leak DetectorWinner
Price$39.99$16.99SwitchBot Water Leak Detector
Rating4.24.4SwitchBot Water Leak Detector
Warranty3 years1 yearShelly Flood Gen4
Weather ResistanceIP44IP67SwitchBot Water Leak Detector
Connectivity2.4 GHz WiFi, Bluetooth, Zigbee2.4 GHz WiFi, BluetoothShelly Flood Gen4
IntegrationsGoogle Home, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Apple HomeKit, Samsung SmartThings, Home AssistantShelly Flood Gen4
SensorsWater Leak, TemperatureWater LeakShelly Flood Gen4
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsWater Leak AlertsShelly Flood Gen4
Battery Life2 years2 yearsTie
On Device Alert SoundYESYESTie
On Device Alert LightYESYESTie

What the differences mean

Probe cable

The Shelly Flood Gen4 includes a 2 m extendable cable, so the body can sit somewhere reachable while the sense lead runs under a cabinet or along a heater. The SwitchBot Water Leak Detector has no cable. The whole puck has to sit where the water will actually touch it.

Temperature

The Shelly Flood Gen4 lists a temperature sensor, temperature alerts and freeze alerts. The SwitchBot Water Leak Detector lists none of those. If a pipe can freeze, the Shelly is the sensor that says so.

Radios and Matter

The Shelly Flood Gen4 lists 2.4 GHz Wi-Fi, Bluetooth, Zigbee and Matter. The SwitchBot Water Leak Detector lists Wi-Fi and Bluetooth only, with Matter marked unsupported. Both list Google Home, Apple Home, SmartThings and Home Assistant. Both mark Alexa unsupported.

Seal, batteries, warranty

The SwitchBot Water Leak Detector is IP67 and runs on two AAA cells for a rated 2 years, with a 1-year warranty. The Shelly Flood Gen4 is IP44, uses four AA cells for a rated 2 years, and carries a 3-year warranty. Same endurance claim, different cell count and a much tougher seal on the SwitchBot.

Which one to buy if

Winner
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 $16.99
  • - Rating: 4.2 vs 4.4

What owners say

Owners of both like a local buzzer, then they complain about different setup paths. Shelly Flood Gen4 owners, especially on Zigbee with Home Assistant, describe a fast pair and a cable sensitive enough to catch a single drop under a cabinet. A few used on-device automations to cut power to another Shelly device. Wi-Fi onboarding is the recurring gripe, and some Matter or HomeKit users say the leak status did not refresh until they pressed the button. SwitchBot Water Leak Detector owners praise a hub-free setup in a few minutes and real catches, from a basement to a washer hose. They warn that water pooling just off the contacts is missed, because there is no cable, and that the alarm is easier to lose from another room.

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
  • SwitchBot Water Leak Detector

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Frequently Asked Questions

Which is better overall: Shelly Flood Gen4 or SwitchBot Water Leak Detector?

The Shelly Flood Gen4, because the cable, Zigbee, Matter, temperature and the 3-year warranty add up to more sensor than a Wi-Fi puck. The SwitchBot Water Leak Detector is the better buy when you want IP67 and a simpler Wi-Fi or Bluetooth setup and do not need freeze alerts.

What is the biggest difference between the Shelly Flood Gen4 and the SwitchBot Water Leak Detector?

The Shelly Flood Gen4 includes a 2 m probe cable and lists Wi-Fi, Bluetooth, Zigbee and Matter, plus temperature. The SwitchBot Water Leak Detector has no cable and no temperature sensor, and it is sealed to IP67 instead of IP44.

Do the Shelly Flood Gen4 and the SwitchBot Water Leak Detector both work with Apple Home?

Yes. Both list Apple Home. The Shelly Flood Gen4 also lists Matter. The SwitchBot Water Leak Detector marks Matter unsupported. Neither lists Alexa.

Which water leak sensor has a longer warranty?

The Shelly Flood Gen4 is warrantied for 3 years and the SwitchBot Water Leak Detector for 1 year. Battery life is rated at 2 years for both, on four AA cells for Shelly and two AAA cells for SwitchBot.

Who should buy the Shelly Flood Gen4?

Home Assistant, Zigbee or Matter households that want one sensor with a probe cable, freeze alerts and local automations, and who can tolerate a fussier Wi-Fi path.

Who should buy the SwitchBot Water Leak Detector?

Anyone who wants a hub-free IP67 puck on Wi-Fi or Bluetooth, with a siren, and who only needs to watch the spot directly under the device.

Full comparison table

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