Outcome
This companion comparison post compares Sonoff | Smart Plug-in Unit to the top live alternatives found on April 10, 2026, including current Amazon and Alibaba checks.
Source Device
The Sonoff S31 is a Wi-Fi smart plug for controlling appliances without rewiring. It uses the eWeLink app and can be reflashed for local control with ESPHome or Tasmota. Some variants offer energy monitoring. It integrates with Home Assistant via the Sonoff (eWeLink) integration or custom firmware, and supports Alexa/Google Voice Control via eWeLink.
Top Alternatives
- Shelly Plug US Gen4 / Shelly Plug S Gen3: This smart plug offers robust local control, energy monitoring, and native Home Assistant integration out-of-the-box, similar to a Sonoff S31 reflashed with custom firmware but without the need for flashing. It supports multiple protocols including Wi-Fi, Matter, Zigbee, and Bluetooth, providing versatile connectivity options.
- TP-Link Tapo P110M Mini Smart Wi-Fi Plug: The Tapo P110M is a popular Wi-Fi smart plug with energy monitoring and Matter compatibility, offering a modern and feature-rich alternative to the Sonoff S31. It integrates well with Home Assistant, although some local control aspects might require specific configurations or HACS integrations.
- Aqara Smart Plug (US Version): As a Zigbee smart plug with energy monitoring, the Aqara Smart Plug offers a robust alternative to Wi-Fi-based devices like the Sonoff S31, especially for users looking to build a Zigbee mesh network. It requires an Aqara Hub for full functionality, which provides local automation capabilities similar to a reflashed Sonoff with Home Assistant.
Comparison Matrix
| Category | Sonoff | Smart Plug-in Unit | Shelly Plug US Gen4 / Shelly Plug S Gen3 | TP-Link Tapo P110M Mini Smart Wi-Fi Plug | Aqara Smart Plug (US Version) |
|---|---|---|---|---|
| Features | Source device | ★★★★★ | ★★★★☆ | ★★★★☆ |
| Interoperability | Source device | ★★★★★ | ★★★★☆ | ★★★★☆ |
| Setup Ease | Source device | ★★★★☆ | ★★★★☆ | ★★★☆☆ |
| Cloud Dependency | Source device | ★★★★★ | ★★★☆☆ | ★★★★☆ |
| Vendor Trust | Source device | ★★★★☆ | ★★★★☆ | ★★★★☆ |
| Overall | Source device | ★★★★★ | ★★★★☆ | ★★★★☆ |
Pricing And Availability
| Device | Amazon Price | Alibaba Price |
|---|---|---|
| Shelly Plug US Gen4 / Shelly Plug S Gen3 | US: $19.99 – $20.00; EU: €23.62 | US $23.56 – $27.82 (on AliExpress) |
| TP-Link Tapo P110M Mini Smart Wi-Fi Plug | $29.99 (2-pack) / $49.99 (4-pack) | Unavailable |
| Aqara Smart Plug (US Version) | Around $32.99 – $34.99 | Unavailable |
Operator Notes
- Prices and availability are subject to change. Alibaba listings for individual consumer products are often found on AliExpress (B2C platform of Alibaba Group) rather than Alibaba.com (B2B platform).
- The Sonoff S31's key advantage is its reflashability for local control. Alternatives were chosen based on offering similar local control capabilities (Shelly, Aqara with hub) or strong cloud-based integration with local HA options (TP-Link Tapo), along with energy monitoring.
Source URLs
Shelly Plug US Gen4 / Shelly Plug S Gen3 | Official: https://shelly.com/products/shelly-plug-us-gen4-smart-home-automation-relay/ (US) / https://shelly.com/products/shelly-plug-s-gen3-wifi-bluetooth-smart-relay/ (EU)
Shelly Plug US Gen4 / Shelly Plug S Gen3 | Home Assistant: https://www.home-assistant.io/integrations/shelly/
Shelly Plug US Gen4 / Shelly Plug S Gen3 | Amazon: https://www.amazon.com/Shelly-Plug-Gen4-Monitoring-Automation/dp/B0CP279812 (US) / https://www.amazon.de/Shelly-Plug-Gen3-Matter-kompatible-Verbrauchsmessung/dp/B0CP279812 (EU - example, actual link may vary by region)
Shelly Plug US Gen4 / Shelly Plug S Gen3 | Alibaba: https://www.aliexpress.com/w/wholesale-shelly-plug-s-gen3.html
TP-Link Tapo P110M Mini Smart Wi-Fi Plug | Official: https://www.tapo.com/us/product/smart-plug/tapo-p110m/
TP-Link Tapo P110M Mini Smart Wi-Fi Plug | Home Assistant: https://www.home-assistant.io/integrations/tplink/
TP-Link Tapo P110M Mini Smart Wi-Fi Plug | Amazon: https://www.amazon.com/TP-Link-Monitoring-Compatible-Assistant-P110M/dp/B0BN178C9R (example, actual link may vary by region)
TP-Link Tapo P110M Mini Smart Wi-Fi Plug | Alibaba: Unavailable (direct listing for individual purchase not found)
Aqara Smart Plug (US Version) | Official: https://www.aqara.com/us/product/smart-plug-us/
Aqara Smart Plug (US Version) | Home Assistant: https://www.home-assistant.io/integrations/aqara/
Aqara Smart Plug (US Version) | Amazon: https://www.amazon.com/Aqara-Smart-Plug-Monitoring-Automation/dp/B081Z9X7V6 (example, actual link may vary by region)
Aqara Smart Plug (US Version) | Alibaba: Unavailable (direct listing for individual purchase not found)