Question 1

Which is better, TP-Link Kasa Smart Plug KP125M or Sonoff S31 Zigbee?

Accepted Answer

Both products scored 8.5/10 in our testing — it's a tie. Choose based on which features matter most to you.

Question 2

Is the TP-Link Kasa Smart Plug KP125M worth it over the Sonoff S31 Zigbee?

Accepted Answer

The TP-Link Kasa Smart Plug KP125M scores 8.5/10 while the Sonoff S31 Zigbee scores 8.5/10. The TP-Link Kasa Smart Plug KP125M is our "Best Overall" pick in the Best Energy Monitoring Plugs 2026 category.

TP-Link Kasa Smart Plug KP125M vs Sonoff S31 Zigbee: Which to Buy?