Eve Water Guard vs Shelly Flood Gen4

The Shelly Flood Gen4 wins overall with a lower price, longer warranty, and support for WiFi, Zigbee, Bluetooth, and Matter. The Eve Water Guard still carries a higher owner rating and suits HomeKit-only households better.

Connectivity range versus ecosystem depth. The Shelly Flood Gen4 speaks WiFi, Zigbee, Bluetooth, and Matter, reaching nearly every platform, while the Eve Water Guard is a wired, HomeKit-and-Thread-first sensor with no Alexa, Google Home, or SmartThings support at all.

The Shelly Flood Gen4 does. It reaches Google Home, Alexa, Apple HomeKit (via Matter), SmartThings, and Home Assistant, and adds a temperature sensor with freeze alerts, well past the Eve Water Guard's HomeKit-and-Home-Assistant-only scope.

Yes, its owner rating remains higher, and it runs on wired power rather than batteries, which some HomeKit households prefer for a permanent installation with no maintenance.

Buyers who want the more affordable sensor with the longest warranty and the widest protocol support, especially anyone using Zigbee2MQTT, Home Assistant, or a Matter-based setup.

Apple HomeKit and Thread households that want a wired sensor with no batteries and the better-reviewed track record should stick with the Eve Water Guard.