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Water Leak Sensors · Head to head

Eve Water Guard vs Tapo T300

Full Smart Water Leak Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Eve and TP-Link sites.
2026 verdict
Battery puck or a cable on wall power? The Tapo T300 is the better value leak sensor of these two, cheaper, better reviewed and free of any outlet, with a 90 dB alarm, IP67 sealing and up to 3 years on two AAA batteries.
Tapo T300
Winner
Tapo T300
$16.99$19.9915% OFF
Buy on Amazon USACheck price
It sends low battery alerts and works with Google Home and, partially, Home Assistant, through a Tapo Hub. The Eve Water Guard does a different job: its 2 m sensing cable, extendable to 150 m, watches a whole appliance run, it sounds 100 dB with a light, and it works with Apple Home and Home Assistant over Thread and Bluetooth, with Matter announced but not yet available. It needs wall power and a Thread border router. Buy the Tapo T300 for spot sensors in a Tapo or Google home, and the Eve Water Guard for an Apple Home that needs one sensor along a long stretch.
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FeatureEve Water GuardTapo T300Winner
Price$109.95$16.99Tapo T300
Rating4.54.6Tapo T300
ConnectivityBluetooth, Thread ProtocolOtherEve Water Guard
AlertsWater Leak AlertsWater Leak Alerts, Low Battery AlertsTapo T300
Weather ResistanceYESIP67Tie
Warranty1 year1 yearTie
IntegrationsApple HomeKit, Home AssistantGoogle Home, Home AssistantTie
SensorsWater LeakWater LeakTie
On Device Alert SoundYESYESTie
On Device Alert LightYESYESTie

What the differences mean

Detection area

The Eve Water Guard senses along its 2 m cable, extendable to 150 m, so one unit covers the length of a counter or a row of appliances. The Tapo T300 detects at its own top and bottom contacts, so it has to sit where the water will go.

Power

The Eve Water Guard runs on wall power, so no batteries but an outlet nearby. The Tapo T300 runs about 3 years on two AAA batteries and warns when they run low.

Platforms

The Eve Water Guard works with Apple Home and Home Assistant over Thread, which needs a border router. The Tapo T300 works with Google Home and partially with Home Assistant through a Tapo Hub. Neither covers both Apple and Google.

Alarm

Both sound an alarm and light up on the device, 100 dB for the Eve Water Guard and 90 dB for the Tapo T300.

Which one to buy if

What owners say

Owners of both credit their sensor with catching real leaks and a loud alarm with instant phone alerts. Eve Water Guard owners single out native Apple Home setup with no account, and a cable that covers a whole kitchen or laundry run instead of one spot; they call it expensive, note it needs an outlet and that the fabric cable must absorb a little water before it triggers, and a few had units stop detecting. Tapo T300 owners praise months of stable connection, quick setup alongside other Tapo and Kasa devices and detection from the top and bottom, while complaining that the Tapo Hub requirement was not obvious and that the small top sensor can miss an off-centre drip.

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.

  • Eve Water Guard
  • Tapo T300

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Frequently Asked Questions

Which is better overall: Eve Water Guard or Tapo T300?

The Tapo T300 for most homes: it is cheaper, better reviewed, battery powered, IP67 sealed and works with Google Home. The Eve Water Guard is the better choice for Apple Home and for covering a long area with one sensing cable.

Does the Tapo T300 need a hub?

Yes. The Tapo T300 connects over a Sub-1GHz radio to a Tapo Hub sold separately. The Eve Water Guard uses Thread and Bluetooth and needs a Thread border router for remote access.

Does the Eve Water Guard use batteries?

No. The Eve Water Guard runs on wall power. The Tapo T300 runs about 3 years on two AAA batteries.

Which one works with Apple Home?

The Eve Water Guard, natively. The Tapo T300 does not support Apple Home, SmartThings or Matter; it works with Google Home and partially with Home Assistant.

Who should buy the Eve Water Guard?

Apple Home and Thread households who want one sensor along a whole kitchen or laundry run and have an outlet nearby.

Who should buy the Tapo T300?

Tapo, Kasa and Google Home users who want affordable, waterproof spot sensors with a loud alarm and years between battery changes.

Full comparison table

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