The honest physics first: a smart speaker always listens for its wake word — that's local processing it can't do without — but it records nothing for the cloud until it hears "Alexa," "Hey Google" or "Siri." What you can control, per each platform's documented settings: delete everything already recorded, stop humans reviewing your clips, disable recordings being saved at all, and mute the mic physically whenever you choose. The catch: voice-history deletion also degrades each assistant's accuracy for you — the documented trade of privacy for personalization.
What does each platform document?
- Amazon Alexa: Settings → Alexa Privacy — voice history deletion (manual, or auto-delete every 3/18 months), a documented "Don't save recordings" option (answers requests without storing audio), and opt-out of voice-review-for-research. The physical mic-mute button disables listening entirely until re-enabled.
- Google Assistant: myactivity.google.com or the Home app — voice-and-audio activity deletable or auto-deleted after 3/18/36 months; Google documents stopping saving outright. Mic mute sits on the speaker's back.
- Apple HomePod/Siri: Settings → Siri (or Home app) — delete Siri history per device; Apple documents that Siri audio "is not retained" by default on modern OS versions, with opt-in improvement programs off by default. Tapping the top mutes the mic.
How do you delete everything today?
- Alexa: Alexa app → More → Activity → Voice History → filter by all time, all devices → delete.
- Google: Home app → your profile → My Activity → delete voice activity, then set auto-delete to 3 months.
- Apple: Settings → Siri → Siri History → Delete, per HomePod.
Then flip the retention settings — "don't save" / auto-delete — so future commands don't accumulate by default.
What about false wakes?
Documented reality: wake words mis-trigger on TV dialogue and similar-sounding phrases, which is how stray audio becomes recordings. Mitigations: change the wake word where the platform allows (Alexa documents alternatives), position speakers away from TVs, and check the voice history periodically — false wakes are visible there, and each entry is deletable. The mic-mute habit during sensitive conversations is the documented zero-tech solution that always works.
Do you have to give up the speaker?
No — the middle path works: retention off, review off, mic-mute routine, periodic history audit. The stricter path is dropping the always-listening speaker for push-to-talk devices (phone assistants, remote buttons) where listening is physically intermittent. What you can't have is a speaker that never listens and still answers — anyone selling that is selling a mute button.
The verdict
Fifteen minutes in each settings app: delete history, stop saving, opt out of review, know where the mute button is. Privacy here is a settings posture, not a product — and every platform documents the knobs.
FAQ
For more context, read How to Set Up Matter and Thread in Your Home, Step by Step.
For more context, read smart home device offline fix.
For more context, read What Matter Actually Does for Your Smart Home, Explained.