$24.99
Also sold in packs
- Pack of 214% OFFC$59.99C$69.98C$30.00 per unitYou save C$9.99Buy
Updated October 2026
Data from the official Amazon and Sonoff sites.
2026 verdict
Between Sonoff WiFi Smart Plug S40 and Amazon Smart Plug, Sonoff WiFi Smart Plug S40 is the better overall pick in 2026, leading on price, energy monitoring, and connectivity.
It builds its lead on price, energy monitoring, and connectivity, then backs it up with a stronger showing on integrations. Amazon Smart Plug is still relevant if you care most about rating, but Sonoff WiFi Smart Plug S40 is the stronger recommendation overall. That is why the final call still favors Sonoff WiFi Smart Plug S40.
Works with
Connectivity
- Wi-Fi 2.4 GHz
vs
Winner
Connectivity
- Wi-Fi 2.4 GHz
- Bluetooth
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| Feature | Amazon Smart Plug | Sonoff WiFi Smart Plug S40 | Winner |
|---|---|---|---|
| Price | $24.99 | $10.90 | Sonoff WiFi Smart Plug S40 |
| Rating | 4.7 | 4.2 | Amazon Smart Plug |
| Energy Monitoring | NO | YES | Sonoff WiFi Smart Plug S40 |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi, Bluetooth | Sonoff WiFi Smart Plug S40 |
| Integrations | Alexa | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Sonoff WiFi Smart Plug S40 |
| Warranty | 1 year | 1 year | Tie |
| Weather Resistance | NO | NO | Tie |
| Plug Format | Type B | Type B | Tie |
| Zigbee Router | NO | NO | Tie |
$24.99
- + Rating: 4.7
- - Price: $24.99 vs $10.90
- - Energy Monitoring: NO vs YES
Winner
$10.90
- + Price: $10.90
- + Energy Monitoring: YES
- + Connectivity: 2.4 GHz WiFi, Bluetooth
- - Rating: 4.2 vs 4.7
Frequently Asked Questions
Which is better overall: Amazon Smart Plug or Sonoff WiFi Smart Plug S40?
Sonoff WiFi Smart Plug S40 has the stronger overall profile in this comparison, especially for price, energy monitoring, and connectivity.
What is the biggest difference between Amazon Smart Plug and Sonoff WiFi Smart Plug S40?
Price is one of the clearest differences: Amazon Smart Plug lists $24.99, while Sonoff WiFi Smart Plug S40 lists $10.90.
Which one looks better on price?
Amazon Smart Plug is listed at $24.99, while Sonoff WiFi Smart Plug S40 is listed at $10.90. Sonoff WiFi Smart Plug S40 (better spec).
Who should buy Amazon Smart Plug?
Choose Amazon Smart Plug if your priority is rating and that matters more than price.
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.
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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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Fire TV Stick 4K Max (2nd Gen)
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