Winner
Updated October 2026
Data from the official Sonoff and TP-Link sites.
2026 verdict
In this 2026 Sonoff WiFi Smart Plug S40 vs TP-Link Tapo P125M comparison, Sonoff WiFi Smart Plug S40 comes out ahead thanks to price and energy monitoring.
What pushes it ahead is price and energy monitoring, and its broader overall balance keeps the advantage from looking narrow. You should still consider TP-Link Tapo P125M if rating and warranty matter more than raw overall balance. In practical terms, Sonoff WiFi Smart Plug S40 is the easier product to recommend.
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| Feature | Sonoff WiFi Smart Plug S40 | TP-Link Tapo P125M | Winner |
|---|---|---|---|
| Price | $10.90 | $11.99 | Sonoff WiFi Smart Plug S40 |
| Rating | 4.2 | 4.5 | TP-Link Tapo P125M |
| Warranty | 1 year | 2 years | TP-Link Tapo P125M |
| Energy Monitoring | YES | NO | Sonoff WiFi Smart Plug S40 |
| Weather Resistance | NO | NO | Tie |
| Plug Format | Type B | Type B | Tie |
| Maximum Load Power | 1800W | 1800W | Tie |
| Connectivity | 2.4 GHz WiFi, Bluetooth | 2.4 GHz WiFi, Bluetooth | Tie |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Tie |
| On/Off Button | YES | YES | Tie |
| Zigbee Router | NO | NO | Tie |
| Local Control | YES | YES | Tie |
Winner
$10.90
- + Price: $10.90
- + Energy Monitoring: YES
- - Rating: 4.2 vs 4.5
- - Warranty: 1 year vs 2 years
$11.99
- + Rating: 4.5
- + Warranty: 2 years
- - Price: $11.99 vs $10.90
- - Energy Monitoring: NO vs YES
Frequently Asked Questions
Which is better overall: Sonoff WiFi Smart Plug S40 or TP-Link Tapo P125M?
Sonoff WiFi Smart Plug S40 has the stronger overall profile in this comparison, especially for price and energy monitoring.
What is the biggest difference between Sonoff WiFi Smart Plug S40 and TP-Link Tapo P125M?
Price is one of the clearest differences: Sonoff WiFi Smart Plug S40 lists $10.90, while TP-Link Tapo P125M lists $11.99.
Which one looks better on price?
Sonoff WiFi Smart Plug S40 is listed at $10.90, while TP-Link Tapo P125M is listed at $11.99. Sonoff WiFi Smart Plug S40 (better spec).
Who should buy Sonoff WiFi Smart Plug S40?
Choose Sonoff WiFi Smart Plug S40 if your priority is price and energy monitoring and that matters more than rating.
Who should buy TP-Link Tapo P125M?
Choose TP-Link Tapo P125M if your priority is rating and warranty and that matters more than price.
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Compare all 43 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.
- 43 Plugs
- 32 specs compared
- 29 filters
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Smart Plug Pro with Energy Monitoring
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Tapo P400M
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Plug M Gen3
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iPlug Gen2 Type F Matter Over WiFi Smart Plug
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Wall Plug (EU)
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Smart Plug (US)
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Plug PM Gen3
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SAWF-07P Air Quality Monitor
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SAWF-08P Air Quality Monitor
- Buttons
RM433R2 Remote Controller
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SNZB-01P Zigbee Wireless Switch
- Cameras
CAM GlassView
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Cam Outdoor DUO
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Cam Slim Gen2
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GK-200MP2-B
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NSPanel Pro Gen2
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NSPanel Pro
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Dongle Lite MG21
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Dongle Max
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Dongle Plus MG24
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Dongle Plus PP10
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Dongle-PZG23
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Z-Wave 800 PoE Dongle Max
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ZBDongle-E
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ZBDongle-P
- Door & Window Sensors
DW2-WIFI
- Door & Window Sensors
SNZB-04 ZigBee Wireless Door/Window Sensor
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Tapo S200B
- Buttons
Tapo S200D
- Cameras
Tapo C100
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Tapo C120
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Tapo C210
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Tapo SolarCam C402
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Tapo TC34
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Kasa EC70
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Kasa KC420WS
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Tapo C200
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Tapo C246D
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Tapo C260
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Tapo C320WS
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Tapo C460
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Tapo C465
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Tapo C500
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Tapo C545D
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Tapo C560WS
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Tapo C615F KIT
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Tapo C660