Water Leak Sensors · Head to head

eufy Security Flood & Freeze Sensor E20 vs Shelly Flood

Full Smart Water Leak Sensors comparison in 2026

Updated February 2026
Data from Amazon and official Eufy and Shelly sites.
2026 verdict
Across the 2026 comparison, eufy Security Flood & Freeze Sensor E20 earns the nod over Shelly Flood on the strength of rating, weather resistance, and battery life.
eufy Security Flood & Freeze Sensor E20
Winner
eufy Security Flood & Freeze Sensor E20
$39.99
Buy on Amazon USACheck price
Its biggest wins come from rating, weather resistance, and battery life, and on device alert sound and on device alert light add more confidence to the verdict. There is still a case for Shelly Flood, but mainly if price and integrations are what you value most. Overall, eufy Security Flood & Freeze Sensor E20 makes more sense for most people.
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Featureeufy Security Flood & Freeze Sensor E20Shelly FloodWinner
Price$39.99$24.99Shelly Flood
Rating4.23.8eufy Security Flood & Freeze Sensor E20
Weather ResistanceIP54NOeufy Security Flood & Freeze Sensor E20
Battery Life5 years1.5 yearseufy Security Flood & Freeze Sensor E20
IntegrationsHome AssistantGoogle Home, Alexa, Samsung SmartThings, Home AssistantShelly Flood
On Device Alert SoundYESNOeufy Security Flood & Freeze Sensor E20
On Device Alert LightYESNOeufy Security Flood & Freeze Sensor E20
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
AlertsWater Leak Alerts, Freeze Temperature Alerts, Low Battery AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsTie

Frequently Asked Questions

Which is better overall: eufy Security Flood & Freeze Sensor E20 or Shelly Flood?

eufy Security Flood & Freeze Sensor E20 has the stronger overall profile in this comparison, especially for rating, weather resistance, and battery life.

What is the biggest difference between eufy Security Flood & Freeze Sensor E20 and Shelly Flood?

Price is one of the clearest differences: eufy Security Flood & Freeze Sensor E20 lists $39.99, while Shelly Flood lists $24.99.

Which one looks better on price?

eufy Security Flood & Freeze Sensor E20 is listed at $39.99, while Shelly Flood is listed at $24.99. Shelly Flood (better spec).

Who should buy eufy Security Flood & Freeze Sensor E20?

Choose eufy Security Flood & Freeze Sensor E20 if your priority is rating and weather resistance and that matters more than price.

Who should buy Shelly Flood?

Choose Shelly Flood if your priority is price and integrations and that matters more than rating.

Full comparison table

Compare all 33 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.

  • 33 Water Leak Sensors
  • 36 specs compared
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