Does the Sonos Era 100 work with HomeKit, Alexa, and Google Home?
Era 100 is a Wi-Fi and Bluetooth stereo speaker that works with Sonos Voice Control, Alexa and AirPlay 2.
It runs on the Sonos app, not the S1 Controller. It suits Alexa users, with native support through the maker's cloud. Home Assistant users reach it through an integration (the maker's cloud).
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.