OpenVoiceOS
openvoiceos.org ↗OpenVoiceOS is a free, open-source voice assistant you run on your own hardware.
Why it’s listed
It suits tinkerers who want a smart speaker without Amazon or Google listening.
It's listed because it's the community continuation of Mycroft, which 'started as MycroftOS', is Apache 2.0 licensed, and its core needs no backend server1. Development is active: ovos-core 3.7.4a1 came out on 8 Oct 20262.
The trade-off
Setup is technical, and the default speech-to-text needs an internet connection (offline options exist).
Price
Free; donations optional.