Roam Home Hub H1

The H1 is a Matter controller and a Thread border router in one, and every automation you build runs on it locally. Pull the internet cable and the lights, locks and blinds carry on; only the remote view goes. It speaks Zigbee and Z-Wave as well, which matters when half the house predates Matter. Voice control is processed on the device, so a microphone in the living room stops being a question about somebody else's servers.