Shelly Flood vs Tapo T300 comparison

Updated June 2026

Data from Amazon and official Shelly and TP-Link sites.

2026 verdict

Silent sensor or one that actually alarms? The Tapo T300 wins this water leak sensor comparison for buyers who want the latter, coming in cheaper than the Shelly Flood while carrying a higher owner rating, weather resistance, a longer battery life, and a built-in alert sound and light the Shelly Flood is missing entirely. The Shelly Flood answers with wider connectivity and integration support, working directly over WiFi with Google Home, Alexa, SmartThings and Home Assistant, plus its own temperature sensor and freeze-alert coverage that the Tapo T300 doesn't include. Buyers who want the cheaper, better-rated, weatherproofed sensor with a real onboard alarm should pick the Tapo T300; those who want broader smart home integration and temperature monitoring in the same device should choose the Shelly Flood.

Price alerts

Water Leak Sensor prices change while you decide

We check the price of every Water Leak Sensor in the catalog daily and email you the drops, whichever one you pick.

Your subscription could not be saved. Please try again.

Your subscription has been successful.

Feature	Shelly Flood	Tapo T300	Winner
Price	$24.99	$19.99	Tapo T300
Rating	3.8	4.6	Tapo T300
Warranty	2 years	1 year	Shelly Flood
Weather Resistance	NO	IP67	Tapo T300
Battery Life	1.5 years	3 years	Tapo T300
Connectivity	2.4 GHz WiFi	None	Shelly Flood
Integrations	Google Home, Alexa, Samsung SmartThings, Home Assistant	Google Home, Alexa, Home Assistant	Shelly Flood
Sensors	Water Leak, Temperature	Water Leak	Shelly Flood
Alerts	Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts	Water Leak Alerts	Shelly Flood
On Device Alert Sound	NO	YES	Tapo T300
On Device Alert Light	NO	YES	Tapo T300

Shelly

Shelly Flood

$24.99

Buy on Amazon USA

+ Warranty: 2 years
+ Connectivity: 2.4 GHz WiFi
+ Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant
- Price: $24.99 vs $19.99
- Rating: 3.8 vs 4.6

Winner

TP-Link

Tapo T300

$19.99

Buy on Amazon USA

+ Price: $19.99
+ Rating: 4.6
+ Weather Resistance: IP67
- Warranty: 1 year vs 2 years
- Connectivity: None vs 2.4 GHz WiFi

Frequently Asked Questions

Which is better overall, the Shelly Flood or the Tapo T300?

The Tapo T300 wins overall on price, owner rating, weather resistance, battery life, and its built-in alarm sound and light. The Shelly Flood answers with wider connectivity, more integrations, and added temperature and freeze-alert sensing.

What is the biggest difference between the Shelly Flood and the Tapo T300?

Local alerting versus platform reach. The Tapo T300 has a loud on-device alarm and light, while the Shelly Flood has neither but connects directly to more platforms, including SmartThings and Home Assistant, and adds temperature sensing.

Does either sensor need extra hardware to work?

The Tapo T300 requires a separate Tapo Hub since it connects over a Sub-1GHz radio rather than WiFi directly. The Shelly Flood connects straight to 2.4GHz WiFi with no separate hub needed.

Which one also monitors temperature and freeze risk?

The Shelly Flood. It includes a temperature sensor with temperature and freeze-temperature alerts, categories the Tapo T300 does not cover.

Who should buy the Tapo T300?

Buyers who want the cheaper, better-rated, weatherproof sensor with a genuinely loud built-in alarm and light.

Who should buy the Shelly Flood?

Buyers who want hub-free WiFi connectivity with SmartThings and Home Assistant support, plus temperature and freeze-alert sensing.

Full comparison table

Compare all 31 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.

31 Water Leak Sensors
36 specs compared
33 filters

Open the full comparison

More Water Leak Sensors

Top Water Leak Sensors to compare next

Compare smart water leak sensors by power source, connectivity, water and temperature alerts, weather resistance, battery life, integrations, and automation features.

All Water Leak Sensors