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Plugs · Head to head

Sonoff S31 WiFi Smart Plug vs TP-Link Tapo P125M

Full Smart Plugs comparison in 2026

Updated September 2026
Data from Amazon and official Sonoff and TP-Link sites.
2026 verdict
Across the 2026 comparison, Sonoff S31 WiFi Smart Plug earns the nod over TP-Link Tapo P125M on the strength of price and energy monitoring.
Sonoff S31 WiFi Smart Plug
Winner
Sonoff S31 WiFi Smart Plug
$10.90
Buy on Amazon USACheck price
It builds its lead on price and energy monitoring, then backs it up with a stronger showing on its broader overall balance. There is still a case for TP-Link Tapo P125M, but mainly if rating and connectivity are what you value most. That is why Sonoff S31 WiFi Smart Plug wins the verdict here.
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FeatureSonoff S31 WiFi Smart PlugTP-Link Tapo P125MWinner
Price$10.90$11.99Sonoff S31 WiFi Smart Plug
Rating4.14.5TP-Link Tapo P125M
Energy MonitoringYESNOSonoff S31 WiFi Smart Plug
Connectivity2.4 GHz WiFi2.4 GHz WiFi, BluetoothTP-Link Tapo P125M
Weather ResistanceNONOTie
Plug FormatType BType BTie
Maximum Load Power1800W1800WTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
On/Off ButtonYESYESTie
Zibgee RouterNONOTie

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Sonoff S31 WiFi Smart Plug
  • TP-Link Tapo P125M

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Frequently Asked Questions

Which is better overall: Sonoff S31 WiFi Smart Plug or TP-Link Tapo P125M?

Sonoff S31 WiFi Smart Plug has the stronger overall profile in this comparison, especially for price and energy monitoring.

What is the biggest difference between Sonoff S31 WiFi Smart Plug and TP-Link Tapo P125M?

Price is one of the clearest differences: Sonoff S31 WiFi Smart Plug lists $10.90, while TP-Link Tapo P125M lists $11.99.

Which one looks better on price?

Sonoff S31 WiFi Smart Plug is listed at $10.90, while TP-Link Tapo P125M is listed at $11.99. Sonoff S31 WiFi Smart Plug (better spec).

Who should buy Sonoff S31 WiFi Smart Plug?

Choose Sonoff S31 WiFi Smart Plug 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 connectivity and that matters more than price.

Full comparison table

Compare all 36 Plugs side by side

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  • 36 Plugs
  • 31 specs compared
  • 28 filters
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