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Plugs · Head to head

Sonoff WiFi Smart Plug S40 Lite vs TP-Link Kasa EP40

Full Smart Plugs comparison in 2026

Updated October 2026
Data from Amazon and official Sonoff and TP-Link sites.
2026 verdict
TP-Link Kasa EP40 has the better all-around case than Sonoff WiFi Smart Plug S40 Lite in 2026, starting with rating, warranty, and weather resistance.
TP-Link Kasa EP40
Winner
TP-Link Kasa EP40
$14.99$24.9940% OFFPrime exclusive deal

Last recorded price

Buy on Amazon USA
It separates itself most clearly on rating, warranty, and weather resistance, while still looking better on maximum load power. There is still a case for Sonoff WiFi Smart Plug S40 Lite, but mainly if connectivity and integrations are what you value most. That keeps the verdict firmly in favor of TP-Link Kasa EP40.
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FeatureSonoff WiFi Smart Plug S40 LiteTP-Link Kasa EP40Winner
Rating4.24.6TP-Link Kasa EP40
Warranty1 year2 yearsTP-Link Kasa EP40
Weather ResistanceNOIP64TP-Link Kasa EP40
Maximum Load Power1500W1875WTP-Link Kasa EP40
Connectivity2.4 GHz WiFi, Bluetooth2.4 GHz WiFiSonoff WiFi Smart Plug S40 Lite
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Samsung SmartThings, Home AssistantSonoff WiFi Smart Plug S40 Lite
Plug FormatType BType BTie
Energy MonitoringNONOTie
On/Off ButtonYESYESTie
Zigbee RouterNONOTie
Sonoff

Sonoff WiFi Smart Plug S40 Lite

Prime exclusive deal

Last recorded priceDec 3, 2025$11.99

Currently unavailable on Amazon USA
See on Amazon USA
  • + Connectivity: 2.4 GHz WiFi, Bluetooth
  • + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
  • - Rating: 4.2 vs 4.6
  • - Warranty: 1 year vs 2 years
Winner
TP-Link

TP-Link Kasa EP40

40% OFF
Prime exclusive deal
$14.99
$24.99

Last recorded price

Buy on Amazon USA
  • + Rating: 4.6
  • + Warranty: 2 years
  • + Weather Resistance: IP64
  • - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, Bluetooth
  • - Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Sonoff WiFi Smart Plug S40 Lite
  • TP-Link Kasa EP40

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Frequently Asked Questions

Which is better overall: Sonoff WiFi Smart Plug S40 Lite or TP-Link Kasa EP40?

TP-Link Kasa EP40 has the stronger overall profile in this comparison, especially for rating, warranty, and weather resistance.

What is the biggest difference between Sonoff WiFi Smart Plug S40 Lite and TP-Link Kasa EP40?

Rating is one of the clearest differences: Sonoff WiFi Smart Plug S40 Lite lists 4.2, while TP-Link Kasa EP40 lists 4.6.

Who should buy Sonoff WiFi Smart Plug S40 Lite?

Choose Sonoff WiFi Smart Plug S40 Lite if your priority is connectivity and integrations and that matters more than rating.

Who should buy TP-Link Kasa EP40?

Choose TP-Link Kasa EP40 if your priority is rating and warranty and that matters more than connectivity.

Full comparison table

Compare all 37 Plugs side by side

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  • 37 Plugs
  • 31 specs compared
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