Does the Shelly 1 Gen3 work with HomeKit, Alexa, and Google Home?
The Shelly 1 Gen3 gets Matter over Wi-Fi after a firmware update and a setting in its web page.
It is a one-channel in-wall relay with Wi-Fi and Bluetooth. It suits Google Home, Alexa and SmartThings users through an integration (the maker's cloud). Home Assistant users reach it through an integration (local Wi-Fi control).
How the device gets into the platform on this route. The headline is the best route: local before cloud, direct before bridged, core before community. The methodology page lists every level.