Updated July 2026
Data from Amazon and official Shelly and YoLink sites.
2026 verdict
The YoLink Water Leak Sensor 4 pulls ahead of the Shelly Flood in this water leak sensor pairing, backed by a lower price, a higher owner rating, stronger weather resistance, a longer battery life, and support for more alerts, including freeze-temperature warnings alongside its on-device alarm sound and light. Shelly's one real advantage is broader integrations, connecting directly over WiFi to Google Home, Alexa, SmartThings and Home Assistant, a wider net than the YoLink's Alexa and Home Assistant support through its own hub. Anyone chasing the cheaper, better-rated, longer-lasting sensor with a real local alarm should pick the YoLink Water Leak Sensor 4; those who specifically need Google Home or SmartThings support should stick with the Shelly Flood.
| Feature | Shelly Flood | YoLink Water Leak Sensor 4 | Winner |
|---|---|---|---|
| Price | $24.99 | $17.09 | YoLink Water Leak Sensor 4 |
| Rating | 3.8 | 4.8 | YoLink Water Leak Sensor 4 |
| Weather Resistance | NO | IP66 | YoLink Water Leak Sensor 4 |
| Battery Life | 1.5 years | 5 years | YoLink Water Leak Sensor 4 |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Alexa, Home Assistant, IFTTT | Shelly Flood |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | YoLink Water Leak Sensor 4 |
| On Device Alert Sound | NO | YES | YoLink Water Leak Sensor 4 |
| On Device Alert Light | NO | YES | YoLink Water Leak Sensor 4 |
| Warranty | 2 years | 2 years | Tie |
| Connectivity | 2.4 GHz WiFi | Other | Tie |
| Sensors | Water Leak, Temperature | Water Leak, Temperature | Tie |
$24.99
- + Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant
- - Price: $24.99 vs $17.09
- - Rating: 3.8 vs 4.8
Winner
29% OFF
$17.09
$23.99
- + Price: $17.09
- + Rating: 4.8
- + Weather Resistance: IP66
- - Integrations: Alexa, Home Assistant, IFTTT vs Google Home, Alexa, Samsung SmartThings, Home Assistant
Frequently Asked Questions
Which is better overall: Shelly Flood or YoLink Water Leak Sensor 4?
The YoLink Water Leak Sensor 4 wins overall on price, owner rating, weather resistance, battery life and its alarm sound and light. The Shelly Flood keeps an edge in overall integrations, reaching Google Home and SmartThings that the YoLink doesn't.
What is the biggest difference between the Shelly Flood and the YoLink Water Leak Sensor 4?
Platform reach versus local alerting and durability. The Shelly Flood connects natively to Google Home and SmartThings over WiFi, while the YoLink Water Leak Sensor 4 needs its own hub but adds a louder alarm, tougher weatherproofing and freeze-temperature alerts.
Which one also warns about freezing pipes?
The YoLink Water Leak Sensor 4. It supports freeze-temperature alerts alongside leak detection, a feature the Shelly Flood's temperature sensor doesn't extend to in the same way.
Does either connect to Google Home?
Only the Shelly Flood. It works with Google Home directly over WiFi, while the YoLink Water Leak Sensor 4 supports Alexa and Home Assistant but not Google Home or SmartThings.
Who should buy the YoLink Water Leak Sensor 4?
Buyers who want the cheaper, better-rated, more weather-resistant sensor with a loud local alarm and freeze-alert coverage.
Who should buy the Shelly Flood?
Buyers who specifically need direct Google Home or SmartThings integration over WiFi without adding another hub.
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