Thanks for reaching out. Our Nest thermostat devices can be controlled with Google Assistant and Amazon Alexa.
As for Savant Automation System, it is best to reach out to Savant support themselves. They will be the best team to answer your questions.
We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.