Winner
Price unavailable right now
Updated November 2026
Data from the official Shelly and Sonoff sites.
2026 verdict
Scripting and monitoring against Zigbee mesh building: the Shelly Smart Plug (US) is the more capable smart plug overall, winning on built-in energy monitoring, overheat/overload protection and broader onboard connectivity (Wi-Fi plus a Bluetooth gateway). It works with no hub and exposes an open API that home-lab and Home Assistant users lean on, whereas the Sonoff Zigbee Smart Plug S40 Lite is Zigbee-only and must have a hub to function. Both plugs share a 1800W, 15A Type B rating, so raw capacity is even. The Sonoff Zigbee Smart Plug S40 Lite wins back ground on a lower price, a longer integration list that includes Samsung SmartThings and IFTTT, and its Zigbee router role that repeats mesh signal. Reach for the Shelly Smart Plug (US) when you want energy data and deep automation control; the Sonoff Zigbee Smart Plug S40 Lite is the affordable way to add and extend a Zigbee network.
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| Feature | Shelly Smart Plug (US) | Sonoff Zigbee Smart Plug S40 Lite | Winner |
|---|---|---|---|
| Rating | 4.5 | 4.4 | Shelly Smart Plug (US) |
| Overheat/Overload Protection | YES | NO | Shelly Smart Plug (US) |
| Energy Monitoring | YES | NO | Shelly Smart Plug (US) |
| Connectivity | 2.4 GHz WiFi, Bluetooth | Zigbee | Shelly Smart Plug (US) |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Sonoff Zigbee Smart Plug S40 Lite |
| Zigbee Router | NO | YES | Sonoff Zigbee Smart Plug S40 Lite |
| Weather Resistance | NO | NO | Tie |
| Plug Format | Type B | Type B | Tie |
| Maximum Load Power | 1800W | 1800W | Tie |
| On/Off Button | YES | YES | Tie |
| Local Control | YES | YES | Tie |
Winner
Price unavailable right now
- + Rating: 4.5
- + Overheat/Overload Protection: YES
- + Energy Monitoring: YES
- - Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Zigbee Router: NO vs YES
$12.99
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- + Zigbee Router: YES
- - Rating: 4.4 vs 4.5
- - Overheat/Overload Protection: NO vs YES
Frequently Asked Questions
Which is better overall, the Shelly Smart Plug (US) or the Sonoff Zigbee Smart Plug S40 Lite?
The Shelly Smart Plug (US) wins overall, adding energy monitoring, overheat/overload protection and richer connectivity with an open API. The Sonoff Zigbee Smart Plug S40 Lite counters with a lower price, more integrations and a Zigbee router role.
Which one monitors energy usage?
Only the Shelly Smart Plug (US). It provides real-time and historical energy monitoring, which home-lab and Home Assistant users rely on. The Sonoff Zigbee Smart Plug S40 Lite has no energy monitoring.
Do these plugs need a hub?
The Sonoff Zigbee Smart Plug S40 Lite does, since it is Zigbee-only. The Shelly Smart Plug (US) connects over 2.4GHz Wi-Fi and Bluetooth with no hub, and can even act as a Bluetooth gateway.
Does the Sonoff Zigbee Smart Plug S40 Lite support Zigbee mesh extension?
Yes. The Sonoff Zigbee Smart Plug S40 Lite works as a Zigbee router, repeating signal to strengthen the mesh. The Shelly Smart Plug (US) does not support Zigbee, so it cannot serve that role.
Who should buy the Shelly Smart Plug (US)?
Automation-minded buyers who want energy tracking, overload protection and an open API for custom scripting or Home Assistant, in a plug that runs over Wi-Fi and Bluetooth without a hub.
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