[mibollma]

You could also keep using Alexa and add a do-it-yourself privacy enhancement called Alias: https://www.instructables.com/Project-Alias/

[chmac]

This is freakin EPIC. A hat that captures audio and then decides whether or not to relay it to the physical Alexa / Google / etc speaker. I struggle to believe it'd be super reliable, but the concept is ultra cool!