Water Leak Sensors · Head to head

Arlo All-in-One Sensor vs Shelly Flood

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Arlo and Shelly sites.
2026 verdict
Three sensors in one puck settle this: the Arlo All-in-One Sensor is the more versatile water leak sensor of these two, adding freeze and tilt to leak detection where the Shelly Flood watches water and temperature only.
Arlo All-in-One Sensor
Winner
Arlo All-in-One Sensor
$27.90$29.997% OFF

Last recorded price

Buy on Amazon USA
It carries the higher owner rating and reaches Google Home, Alexa and SmartThings through Arlo's cloud, but it reports only through an Arlo Security System hub and has no local sound or light. The Shelly Flood joins Wi-Fi on its own with no hub, costs less, carries a two-year warranty against one and works with Google Home, SmartThings and Home Assistant, though it too has no on-device alarm. Pick the Arlo All-in-One Sensor for an existing Arlo home that wants richer sensing, and the Shelly Flood for a hub-free Wi-Fi install on a budget.
vs
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
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.
Tick the box above to finish signing up.
We couldn't verify you're human. Please try again.
Too many attempts. Please try again in an hour.
Your subscription has been successful.
FeatureArlo All-in-One SensorShelly FloodWinner
Rating4.03.8Arlo All-in-One Sensor
Warranty1 year2 yearsShelly Flood
IntegrationsGoogle Home, Alexa, Samsung SmartThingsGoogle Home, Samsung SmartThings, Home AssistantArlo All-in-One Sensor
SensorsWater Leak, Temperature, TiltWater Leak, TemperatureArlo All-in-One Sensor
ConnectivityOther2.4 GHz WiFiTie
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsTie
On Device Alert SoundNONOTie
On Device Alert LightNONOTie

What the differences mean

Sensing

The Arlo All-in-One Sensor bundles water, temperature, freeze and tilt detection into one puck. The Shelly Flood covers water and temperature, so a knock or a moved object that a tilt sensor would catch goes unnoticed.

Hub

The Arlo All-in-One Sensor has no radio of its own and reports only through an Arlo Security System hub. The Shelly Flood joins a 2.4 GHz network directly, so there is no base station to buy or place.

Integrations

The Arlo All-in-One Sensor works with Google Home, Alexa and SmartThings through Arlo's cloud, but not Apple Home, Home Assistant or Matter. The Shelly Flood covers Google Home, SmartThings and Home Assistant, but not Apple HomeKit, Matter or Alexa.

Local alarm

Neither has an on-device sound or light, so both reach you only through the app or the hub. If you want the sensor itself to make noise, neither of these two is the pick for that job.

Battery

The Shelly Flood runs on a single CR123A rated for roughly 1.5 years, and the battery is not included. The Arlo All-in-One Sensor uses a CR2477 coin cell whose life the spec sheet does not state, and some owners report it draining faster than expected.

Warranty

The Shelly Flood carries a two-year warranty against one year for the Arlo All-in-One Sensor, and it is also the cheaper of the two. For a device meant to sit unnoticed for years, that longer cover is worth weighing.

Which one to buy if

Winner
Arlo

Arlo All-in-One Sensor

7% OFF
Prime exclusive deal
$27.90
$29.99

Last recorded price

Buy on Amazon USA
  • + Rating: 4.0
  • + Integrations: Google Home, Alexa, Samsung SmartThings
  • + Sensors: Water Leak, Temperature, Tilt
  • - Warranty: 1 year vs 2 years
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
  • - Rating: 3.8 vs 4.0
  • - Integrations: Google Home, Samsung SmartThings, Home Assistant vs Google Home, Alexa, Samsung SmartThings

What owners say

Owners of both sensors tell the same success story first: the device caught a leak before it spread, and setup was quick. Arlo All-in-One Sensor owners like having leak, freeze and tilt in one small unit that shares the app and automations with their Arlo cameras, and several list a leak caught early as the reason they trust it. Their doubts are the hub requirement and a minority who see battery life fall short or occasional false status flags. Shelly Flood owners, many in Home Assistant, value the no-app browser setup and automatic pickup on the network, and they lean on the temperature reading as a second function. Their recurring complaint is Wi-Fi reliability, with units dropping off and needing 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.

  • Arlo All-in-One Sensor
  • Shelly Flood

Loading price history...

Frequently Asked Questions

Which is better overall: the Arlo All-in-One Sensor or the Shelly Flood?

The Arlo All-in-One Sensor for an existing Arlo household, since it adds temperature, freeze and tilt in one small unit on the hub you already own. The Shelly Flood is the better value for a hub-free Wi-Fi or Home Assistant home that wants a cheap, simple leak and temperature sensor.

What is the biggest difference between the Arlo All-in-One Sensor and the Shelly Flood?

How each one connects and how much it senses. The Arlo All-in-One Sensor reports only through an Arlo Security System hub but covers water, freeze and tilt, while the Shelly Flood joins Wi-Fi alone and senses water and temperature.

Does the Arlo All-in-One Sensor work without an Arlo hub?

No. It has no standalone Wi-Fi, Bluetooth, Zigbee, Z-Wave or Thread radio and reports only through an Arlo Security System hub and the Arlo app. The Shelly Flood, by contrast, needs no hub.

Which of these water leak sensors works with Home Assistant?

The Shelly Flood does, and owners report it is picked up automatically once joined to Wi-Fi. The Arlo All-in-One Sensor has no Home Assistant, Apple Home or Matter support.

Do either of these sensors have a built-in alarm?

No. Neither the Arlo All-in-One Sensor nor the Shelly Flood has an on-device sound or light, so both rely on app notifications or the hub to warn you.

Who should buy the Shelly Flood?

A Home Assistant or Google Home user who wants an inexpensive, hub-free Wi-Fi leak and temperature sensor and does not mind sourcing a CR123A or reconnecting the odd drop-off.

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
Arlo

More Arlo products

A sharper look at other Arlo products worth comparing.

Explore Arlo
Shelly

More Shelly products

A sharper look at other Shelly products worth comparing.

Explore Shelly
Price alert

Get an email when the price drops

How much should it drop?

Cancel anytime from the email.

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