Engadget Best smart plug for Alexa-enabled homes Amazon Smart Plug Assistant support: Alexa | Energy monitoring: No | Matter support: No | Hub required: No If you have many Amazon Echo devices and use Alexa to answer your questions, control your music and manage your timers, Amazon's smart plug makes the most sense. Photo by Amy Skorheim / Engadget Best Matter Plug Kasa Matter Smart Plug KP125M (2-Pack) Assistant support: Alexa, Gemini, Siri, Samsung SmartThings | Energy monitoring: Yes | Matter support: Yes | Hub required: Only with HomeKit The Kasa KP125M plugs are best Matter smart plugs we tried.