Shelly Flood Gen4 vs Tapo T300 (2026): Which to Buy?

Updated September 2026

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

2026 verdict

Winner

$39.99

This water leak sensor comparison goes to the Shelly Flood Gen4, which brings a longer warranty and much wider connectivity and integrations, spanning WiFi, Zigbee, Bluetooth and Matter against the Tapo T300's hub-dependent Sub-1GHz link, plus more supported sensors and alerts overall. The Tapo T300 answers with a lower price, a higher owner rating, better weather resistance, and a longer battery life, making it the cheaper, better-reviewed pick for buyers who don't need the Shelly's protocol range. Both include a built-in alert sound and light. Choose the Shelly Flood Gen4 for the longest warranty and broadest connectivity; pick the Tapo T300 if price, rating, weatherproofing and battery life matter more.

Winner

Shelly

Shelly Flood Gen4

$39.99

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TP-Link

Tapo T300

15% OFF

$16.99

$19.99

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Feature	Shelly Flood Gen4	Tapo T300	Winner
Price	$39.99	$16.99	Tapo T300
Rating	4.2	4.6	Tapo T300
Warranty	3 years	1 year	Shelly Flood Gen4
Weather Resistance	IP44	IP67	Tapo T300
Battery Life	2 years	3 years	Tapo T300
Connectivity	2.4 GHz WiFi, Bluetooth, Zigbee	None	Shelly Flood Gen4
Integrations	Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter	Google Home, Alexa, Home Assistant	Shelly Flood Gen4
Sensors	Water Leak, Temperature	Water Leak	Shelly Flood Gen4
Alerts	Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts	Water Leak Alerts	Shelly Flood Gen4
On Device Alert Sound	YES	YES	Tie
On Device Alert Light	YES	YES	Tie

Winner

Shelly

Shelly Flood Gen4

$39.99

Buy on Amazon USACheck price

+ Warranty: 3 years
+ Connectivity: 2.4 GHz WiFi, Bluetooth, Zigbee
+ Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- Price: $39.99 vs $16.99
- Rating: 4.2 vs 4.6

TP-Link

Tapo T300

15% OFF

$16.99

$19.99

Buy on Amazon USACheck price

+ Price: $16.99
+ Rating: 4.6
+ Weather Resistance: IP67
- Warranty: 1 year vs 3 years
- Connectivity: None vs 2.4 GHz WiFi, Bluetooth, Zigbee

Frequently Asked Questions

Which is better overall, the Shelly Flood Gen4 or the Tapo T300?

The Shelly Flood Gen4 wins overall with a longer warranty, broader connectivity and integrations, and more supported sensors and alerts. The Tapo T300 is cheaper, better rated, more weather resistant, and lasts longer on its battery.

What is the main difference between the Shelly Flood Gen4 and the Tapo T300?

Connectivity flexibility versus value and endurance. The Shelly Flood Gen4 supports WiFi, Zigbee, Bluetooth and Matter directly, while the Tapo T300 needs a Tapo Hub over Sub-1GHz but costs less, is better rated, and lasts longer between battery changes.

Does either need a separate hub to work?

The Tapo T300 requires a Tapo Hub since it connects over Sub-1GHz rather than WiFi directly. The Shelly Flood Gen4 connects natively over WiFi, Zigbee, Bluetooth or Matter without needing a proprietary hub.

Which one has the longer battery life?

The Tapo T300 is rated to last longer between battery changes than the Shelly Flood Gen4.

Who should buy the Shelly Flood Gen4?

Buyers who want the longest warranty and the widest connectivity, without needing a proprietary hub.

Who should buy the Tapo T300?

Buyers who want the cheaper, better-rated, more weather-resistant sensor with the longer battery life, and who don't mind adding a Tapo Hub.

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