Fibaro

Flood Sensor (HomeKit)

Connectivity: Bluetooth

Integrations: Apple HomeKit, Home Assistant

Sensors: Water Leak, Temperature, Tilt

Alerts: Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Tamper Alerts

Features: On Device Alert Sound, On Device Alert Light

SwitchBot

Water Leak Detector (Sensor Cable Edition)

Included accessories: Sensor Cable

Connectivity: 2.4 GHz Wifi, Bluetooth

Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, IFTTT

Sensors: Water Leak

Alerts: Water Leak Alerts

Features: On Device Alert Sound, On Device Alert Light