Winner
Data from Amazon and official Fibaro and Shelly sites.
2026 verdict
Beside a washing machine hose, the Fibaro Flood Sensor (HomeKit) is the water leak sensor to leave on the floor when Apple Home is already the app in the house.
Winner
Fibaro Flood Sensor (HomeKit)Last recorded priceJan 1, 2026$43.28
Currently unavailable on Amazon USA
It adds tilt and tamper sensing, an on-device sound and light, and a 2-year CR123A battery, and it is the better reviewed of the two. The Shelly Flood answers with 2.4 GHz Wi-Fi, Google Home and SmartThings, a 2-year warranty, and the lower price, in a flatter 70 x 70 x 19 mm body. Neither has Matter, and only the Fibaro is in Apple Home. Choose the Fibaro Flood Sensor (HomeKit) for a Home app household that wants a local siren, and the Shelly Flood when the network is Wi-Fi and Home Assistant or SmartThings.
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| Feature | Fibaro Flood Sensor (HomeKit) | Shelly Flood | Winner |
|---|---|---|---|
| Rating | 4.1 | 3.8 | Fibaro Flood Sensor (HomeKit) |
| Warranty | 1 year | 2 years | Shelly Flood |
| Battery Life | 2 years | 1.5 years | Fibaro Flood Sensor (HomeKit) |
| Integrations | Apple HomeKit, Home Assistant | Google Home, Samsung SmartThings, Home Assistant | Shelly Flood |
| Sensors | Water Leak, Temperature, Tilt | Water Leak, Temperature | Fibaro Flood Sensor (HomeKit) |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Tamper Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | Fibaro Flood Sensor (HomeKit) |
| On Device Alert Sound | YES | NO | Fibaro Flood Sensor (HomeKit) |
| On Device Alert Light | YES | NO | Fibaro Flood Sensor (HomeKit) |
| Connectivity | Bluetooth | 2.4 GHz WiFi | Tie |
What the differences mean
Radio and apps
The Fibaro Flood Sensor (HomeKit) reaches Apple Home over Bluetooth and needs an Apple Home hub in range. It does not do Google Home, Alexa, SmartThings or Matter. The Shelly Flood joins 2.4 GHz Wi-Fi and works with Google Home, SmartThings and Home Assistant, but not Apple Home or Matter. A search for official Matter or HomeKit support on the Shelly Flood comes up empty in the spec sheet.
Siren, tilt and tamper
The Fibaro Flood Sensor (HomeKit) sounds and lights up on the puck, and it also reports tilt and tamper, so a moved sensor is its own alert. The Shelly Flood has no on-device sound or light and no tamper alert. If the phone is in another room, only the Fibaro makes noise at the washing machine.
Power
The Fibaro Flood Sensor (HomeKit) is rated for 2 years on a CR123A and can also take optional VDC power. The Shelly Flood is rated for 1.5 years on a CR123A that is not included, so the first install needs a battery from the drawer. Neither is a plug-in sensor in normal use.
What else it measures
Both read water and temperature and both can send temperature and freeze alerts. The Fibaro Flood Sensor (HomeKit) adds tilt. Low-battery alerts are documented on the Shelly Flood. Whether the Fibaro sends one is not documented, so that gap is not a reason to pick either way.
Which one to buy if
- the house already runs on Apple Home
The Fibaro Flood Sensor (HomeKit) joins Apple Home over Bluetooth and adds a local sound, a light, tilt and tamper that the Shelly Flood does not have.
- you want Wi-Fi with Google Home or SmartThings
The Shelly Flood connects on 2.4 GHz Wi-Fi and lists Google Home, SmartThings and Home Assistant. The Fibaro does not list Google Home or SmartThings.
- someone needs to hear the leak from the next room
Only the Fibaro Flood Sensor (HomeKit) has an on-device sound and light. The Shelly Flood alerts through the network.
- you will buy several and watch the warranty
The Shelly Flood is the more affordable of the pair and carries a 2-year warranty, against 1 year on the Fibaro Flood Sensor (HomeKit).
Winner
- + Rating: 4.1
- + Battery Life: 2 years
- + Sensors: Water Leak, Temperature, Tilt
- - Warranty: 1 year vs 2 years
- - Integrations: Apple HomeKit, Home Assistant vs Google Home, Samsung SmartThings, Home Assistant
- + Warranty: 2 years
- + Integrations: Google Home, Samsung SmartThings, Home Assistant
- - Rating: 3.8 vs 4.1
- - Battery Life: 1.5 years vs 2 years
What owners say
Owners of both the Fibaro Flood Sensor (HomeKit) and the Shelly Flood talk about catching a real leak before it spread, and both groups treat setup as something they finished in one sitting once the radio was in range. Fibaro Flood Sensor (HomeKit) owners single out Home app notifications together with the on-device sound and light, and they like the temperature reading for freeze automations. Their complaints are Bluetooth range, sensors dropping offline until an extra Apple TV is added, and an alarm they cannot silence remotely. Shelly Flood owners single out browser setup with no app and automatic pickup in Home Assistant, including temperature. They complain about Wi-Fi dropouts that need a manual reconnect and a CR123A that is not in the box.
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.
- Fibaro Flood Sensor (HomeKit)
- Shelly Flood
Loading price history...
Frequently Asked Questions
Which is better beside a washer: the Fibaro Flood Sensor (HomeKit) or the Shelly Flood?
The Fibaro Flood Sensor (HomeKit) if Apple Home is the system you use. It is the better reviewed of the two and adds tilt, tamper, an on-device sound and light, and a longer rated battery. The Shelly Flood is the pick for Wi-Fi, Google Home, SmartThings and a lower price, with a 2-year warranty.
Does the Shelly Flood support Matter or Apple Home?
No. The Shelly Flood lists neither Matter nor Apple Home. It uses 2.4 GHz Wi-Fi and works with Google Home, SmartThings and Home Assistant. Apple Home in this pair belongs to the Fibaro Flood Sensor (HomeKit), over Bluetooth, and that model does not list Matter either.
What is the biggest difference between the Fibaro Flood Sensor (HomeKit) and the Shelly Flood?
The radio and the local alarm. The Fibaro Flood Sensor (HomeKit) is a Bluetooth Apple Home sensor with sound, light, tilt and tamper. The Shelly Flood is a Wi-Fi sensor with temperature and leak alerts, no on-device siren, and no tilt or tamper reading.
Do both water leak sensors warn about freezing?
Yes. The Fibaro Flood Sensor (HomeKit) and the Shelly Flood both have a temperature sensor and both list temperature alerts and freeze alerts. Only the Fibaro also reports tilt.
Who should buy the Shelly Flood?
Buyers who want a flat Wi-Fi puck for Home Assistant, Google Home or SmartThings, who can supply their own CR123A, and who do not need a siren in the device or Apple Home.
Who should buy the Fibaro Flood Sensor (HomeKit)?
Apple Home households that can keep a Home hub in Bluetooth range, and that want a local sound and light plus tilt and tamper beside a washer, sink or sump.
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.
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