Winner
Updated October 2026
Data from the official Sonoff and TP-Link sites.
2026 verdict
Between Sonoff WiFi Smart Plug S40 and TP-Link Kasa EP10, Sonoff WiFi Smart Plug S40 is the better overall pick in 2026, leading on energy monitoring, connectivity, and integrations.
Its clearest strengths are energy monitoring, connectivity, and integrations, and it still looks stronger on its broader overall balance. TP-Link Kasa EP10 is still relevant if you care most about price, rating, and warranty, but Sonoff WiFi Smart Plug S40 is the stronger recommendation overall. Overall, Sonoff WiFi Smart Plug S40 makes more sense for most people.
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| Feature | Sonoff WiFi Smart Plug S40 | TP-Link Kasa EP10 | Winner |
|---|---|---|---|
| Price | $10.90 | $9.99 | TP-Link Kasa EP10 |
| Rating | 4.2 | 4.5 | TP-Link Kasa EP10 |
| Warranty | 1 year | 2 years | TP-Link Kasa EP10 |
| Energy Monitoring | YES | NO | Sonoff WiFi Smart Plug S40 |
| Connectivity | 2.4 GHz WiFi, Bluetooth | 2.4 GHz WiFi | Sonoff WiFi Smart Plug S40 |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Samsung SmartThings, Home Assistant | Sonoff WiFi Smart Plug S40 |
| Weather Resistance | NO | NO | Tie |
| Plug Format | Type B | Type B | Tie |
| Maximum Load Power | 1800W | 1800W | Tie |
| On/Off Button | YES | YES | Tie |
| Zigbee Router | NO | NO | Tie |
| Local Control | YES | YES | Tie |
Winner
$10.90
- + Energy Monitoring: YES
- + Connectivity: 2.4 GHz WiFi, Bluetooth
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Price: $10.90 vs $9.99
- - Rating: 4.2 vs 4.5
$9.99
- + Price: $9.99
- + Rating: 4.5
- + Warranty: 2 years
- - Energy Monitoring: NO vs YES
- - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, Bluetooth
Frequently Asked Questions
Which is better overall: Sonoff WiFi Smart Plug S40 or TP-Link Kasa EP10?
Sonoff WiFi Smart Plug S40 has the stronger overall profile in this comparison, especially for energy monitoring, connectivity, and integrations.
What is the biggest difference between Sonoff WiFi Smart Plug S40 and TP-Link Kasa EP10?
Price is one of the clearest differences: Sonoff WiFi Smart Plug S40 lists $10.90, while TP-Link Kasa EP10 lists $9.99.
Which one looks better on price?
Sonoff WiFi Smart Plug S40 is listed at $10.90, while TP-Link Kasa EP10 is listed at $9.99. TP-Link Kasa EP10 (better spec).
Who should buy Sonoff WiFi Smart Plug S40?
Choose Sonoff WiFi Smart Plug S40 if your priority is energy monitoring and connectivity and that matters more than price.
Who should buy TP-Link Kasa EP10?
Choose TP-Link Kasa EP10 if your priority is price and rating and that matters more than energy monitoring.
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Compare all 46 Plugs side by side
You are looking at two of them. The full table lines up all Plugs in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 46 Plugs
- 32 specs compared
- 29 filters
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Smart Plug
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Hue Smart plug (US)
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Hue Smart plug (EU)
- Plugs
Kasa EP40
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Mini Plug
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Smart Outdoor Energy Plug
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Decora Smart Plug D215P (2nd Gen)
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Plug Mini
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S61s Outdoor Type F Matter Over WiFi Smart Plug
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iPlug Gen2 S61s Type B Zigbee Power Meter Smart Plug
- Plugs
Smart Plug Pro
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Kasa Outdoor Smart Plug KP401
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Tapo P125M
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Smart Plug (EU)
- Plugs
Smart Plug Pro with Energy Monitoring
- Plugs
Tapo P400M
- Plugs
Plug M Gen3
- Plugs
iPlug Gen2 Type F Matter Over WiFi Smart Plug
- Plugs
Wall Plug (EU)
- Air Quality Monitors
SAWF-07P Air Quality Monitor
- Air Quality Monitors
SAWF-08P Air Quality Monitor
- Buttons
RM433R2 Remote Controller
- Buttons
SNZB-01P Zigbee Wireless Switch
- Cameras
CAM GlassView
- Cameras
Cam Outdoor DUO
- Cameras
Cam Slim Gen2
- Cameras
GK-200MP2-B
- Displays
NSPanel Pro Gen2
- Displays
NSPanel Pro
- Dongles
Dongle Lite MG21
- Dongles
Dongle Max
- Dongles
Dongle Plus MG24
- Dongles
Dongle Plus PP10
- Dongles
Dongle-PZG23
- Dongles
Z-Wave 800 PoE Dongle Max
- Dongles
ZBDongle-E
- Dongles
ZBDongle-P
- Door & Window Sensors
DW2-WIFI
- Door & Window Sensors
SNZB-04 ZigBee Wireless Door/Window Sensor
- Buttons
Tapo S200B
- Buttons
Tapo S200D
- Cameras
Tapo C100
- Cameras
Tapo C120
- Cameras
Tapo C210
- Cameras
Tapo SolarCam C402
- Cameras
Tapo TC34
- Cameras
Kasa EC70
- Cameras
Kasa KC420WS
- Cameras
Tapo C200
- Cameras
Tapo C246D
- Cameras
Tapo C260
- Cameras
Tapo C320WS
- Cameras
Tapo C460
- Cameras
Tapo C465
- Cameras
Tapo C500
- Cameras
Tapo C545D
- Cameras
Tapo C560WS
- Cameras
Tapo C615F KIT
- Cameras
Tapo C660