Full Smart Plugs comparison in 2026
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Where these two are furthest apart, and by how much.
| Feature | Shelly Plug M Gen3 | Sonoff Zigbee Smart Plug S40 Lite | Winner |
|---|---|---|---|
| Price | €12.90 | $12.99 | Shelly Plug M Gen3 |
| Rating | 4.5 | 4.4 | Shelly Plug M Gen3 |
| Warranty | 3 years | 1 year | Shelly Plug M Gen3 |
| Maximum Load Power | 3000W | 1800W | Shelly Plug M Gen3 |
| Overheat/Overload Protection | YES | NO | Shelly Plug M Gen3 |
| Energy Monitoring | YES | NO | Shelly Plug M Gen3 |
| Connectivity | 2.4 GHz WiFi, Bluetooth | Zigbee | Shelly Plug M Gen3 |
| Zigbee Router | NO | YES | Sonoff Zigbee Smart Plug S40 Lite |
| Plug Format | Type F | Type B | Different strengths |
| Weather Resistance | NO | NO | 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 |
The Shelly Plug M Gen3 is better overall as a smart plug. It wins on a 3000W load rating, built-in energy monitoring, and a 3-year warranty. The Sonoff Zigbee Smart Plug S40 Lite is the alternative when you want Zigbee router duty and the more affordable option.
Energy monitoring. Shelly Plug M Gen3 measures power at the outlet, and Sonoff Zigbee Smart Plug S40 Lite does not.
Sonoff Zigbee Smart Plug S40 Lite needs a Zigbee hub to join the network. Shelly Plug M Gen3 talks over Wi-Fi (and Matter where listed) without that extra box.
Yes on the Shelly Plug M Gen3, not on the Sonoff Zigbee Smart Plug S40 Lite. Matter is how the Shelly Plug M Gen3 joins Apple Home, Alexa and Google Home without a brand hub.
Buy the Shelly Plug M Gen3 if a 3000W load rating is the priority, along with built-in energy monitoring and a 3-year warranty. Choose the Sonoff Zigbee Smart Plug S40 Lite instead when Zigbee router duty matters more than those extras.
Buy the Sonoff Zigbee Smart Plug S40 Lite if Zigbee router duty is the priority, along with the more affordable option. Choose the Shelly Plug M Gen3 instead when a 3000W load rating matters more than those extras.
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