Smart Speaker Privacy: A Renter's Guide to Locking Down Alexa and Google Home

If you rent, your smart speaker probably isn’t just yours. It sits on a shared Wi-Fi network, often in a common area with roommates, or it was already plugged in when you moved into a furnished sublet. Every voice command anyone says near it gets processed somewhere, and the default settings on both Alexa and Google Home favor convenience over privacy. That’s not a reason to panic — it’s a reason to spend fifteen minutes locking things down, especially when you’re sharing walls, Wi-Fi, and sometimes devices with people who aren’t you. Here’s what these devices actually record, and exactly how to tighten privacy on each one.

What Your Smart Speaker Actually Records

Smart speakers listen locally for their wake word (“Alexa” or “Hey Google”) using on-device processing — nothing leaves the device until that word is detected. Once triggered, the device streams your request to the company’s cloud servers to interpret it and generate a response, and that audio clip is what gets stored as your “voice history.”

Both companies used to let you disable this cloud storage or delete it later. That’s still mostly true for Google. For Amazon, it changed: as of March 2025, Amazon removed the “Do Not Send Voice Recordings” option that let a handful of Echo devices process simple requests entirely on-device. Amazon said the feature was used by less than 0.03% of Echo owners and that its newer, AI-powered Alexa+ experience requires cloud processing to work. Every Echo request now goes to Amazon’s cloud — but you can still set recordings to auto-delete or opt out of having them used to improve Amazon’s models, so the privacy lever is smaller, not gone.

False wake-ups — the device mishearing its name — are the main source of accidental recordings that pick up more than you intended. That’s a real, documented issue on both platforms, which is exactly why the deletion settings below matter.

Securing Amazon Alexa

Review and delete your voice history — In the Alexa app: More → Settings → Alexa Privacy → Review Voice History (or at amazon.com/mycd under Privacy Settings → Alexa Privacy → Review Voice History). From there, play back or delete individual recordings, a date range, or your entire history at once.
Turn on auto-delete — Under Alexa Privacy, tap Manage Your Alexa Data. Set recordings to delete automatically after 3 or 18 months, or choose “Don’t save recordings,” which processes your request but deletes the audio right after — the closest thing left to the old on-device option.
Enable voice deletion by command — In the same data settings, a toggle lets you say “Alexa, delete what I just said” or “Alexa, delete everything I said today.” Handy, but it also means a roommate could delete recordings without asking — worth a conversation if you’re sharing a device.
Lock down purchasing — Go to Settings → Voice Purchasing and turn off “Purchase by voice” entirely, or keep it on and require a 4-digit code under “Require confirmation code.” That PIN shows up in plain text in the app, so don’t reuse one from anywhere else. Disabling voice purchasing outright is simplest if you’re sharing space.
Use household profiles instead of one shared login — Alexa has no true one-tap “guest mode” like Google. Instead, Amazon Household (Settings → Your Account) lets you invite another adult or add profiles so each person gets their own voice recognition and shopping list rather than one shared account. For visitors who just want music or timers, keep Voice Purchasing off and skip linking personal calendars or contacts to the device.
Review skill permissions — Go to More → Skills & Games → Your Skills and disable anything you don’t recognize or no longer use — old skills are an easy-to-forget source of lingering data access.

Securing Google Home / Google Assistant

Delete your Assistant voice history — Go to myaccount.google.com → Data & Privacy → Web & App Activity → Manage Activity. Anything with an audio icon is a voice recording; tap Details → View Recording to hear it, or use the three-dot menu to delete individual items. To wipe everything, tap Delete at the top and choose “All time.”
Set automatic deletion — In Manage Activity, tap More in the search bar, then “Auto-delete.” Choose 3, 18, or 36 months, and Google keeps deleting on a rolling basis automatically. You can also turn Web & App Activity off entirely, though that disables some personalization.
Turn on Guest Mode for shared or visited devices — Say “Hey Google, turn on Guest Mode” (or toggle it in the Google Home app). While active, Google doesn’t save audio or activity to your account, and the Assistant won’t surface personal results like your calendar. Music, smart home control, timers, and general questions still work. This is the single best tool for a shared rental — on when roommates or guests are around, off when you want personalization back. Note that linked third-party Actions may still log their own activity independently of Google.
Restrict purchases — In the Google Home app, check device or Assistant settings for Payments — you can require a PIN for voice purchases or disable purchasing entirely.
Manage who has access to your home — In the Google Home app: home name → Settings → People, and review who’s linked as a member versus a guest. Members get full control of devices; remove anyone (a former roommate, a previous tenant) who shouldn’t have that access anymore.

Network-Level Protection

Even with every app setting locked down, your smart devices are still tiny computers on your Wi-Fi network, and that network is the bigger attack surface most people ignore. The fix: put IoT devices — speakers, smart plugs, cameras, bulbs — on a separate guest or IoT network from the one your laptop and phone use.

Why it matters: smart home gadgets are notorious for weak, rarely-updated firmware. If one gets compromised, an attacker on that same network can often see other devices on it too. A separate network limits the blast radius — a hacked smart plug on the guest network can’t easily reach your laptop.

Most routers from the last several years support this. In the router’s admin panel (often at 192.168.1.1, or the manufacturer’s app), look for “Guest Network” or “IoT Network” settings. Turn it on, give it its own name and a strong password, and enable “client isolation” if offered — that stops devices from talking to each other, not just to your main network. Then connect your Echo, Google Home, and smart bulbs to it instead of your primary network. As a renter, this is purely a settings change, no drilling involved, and it travels with you if you bring your own router. If your router doesn’t support it, mesh systems like Eero, Google Nest Wifi, or TP-Link Deco offer it through their app even on entry-level plans.

General Best Practices

Use a unique, strong password for your Amazon and Google accounts, not one reused elsewhere. A password manager makes this painless.
Turn on two-factor authentication for both accounts — under Login & Security for Amazon, “2-Step Verification” under Security for Google. This matters more than any single privacy toggle, since account access is the real key to everything.
Keep firmware updated. Both platforms generally update automatically, but check the app for pending updates periodically, especially on older hardware.
Review connected skills (Alexa) and linked apps/services (Google) and remove ones you no longer use — every integration is another party with some access to your data.
Mute the microphone physically for a hard guarantee: every Echo and most Google Home devices have a mute button that cuts power to the mic, which no software setting can override.
If you’re moving out, or into a place with a speaker already installed, factory reset it. On Alexa: Device Settings → Deregister/Factory Reset. On Google devices, follow Google’s reset instructions for your model. This clears Wi-Fi credentials and linked accounts — important for your privacy on the way out, and to avoid inheriting a stranger’s account on the way in.

Frequently Asked Questions

Can Alexa or Google Home record me even when I don’t say the wake word?

No, not by design. Both devices process audio locally and continuously for the wake word only, and that snippet is discarded if the wake word isn’t detected. The real issue is false wake-ups, where the device mishears something as its name and starts recording audio you didn’t intend to send — regularly reviewing and deleting your voice history catches these.

Is it safe to use a smart speaker in a shared rental with roommates I don’t fully trust?

It can be, if you set it up deliberately rather than leaving defaults in place. Use Guest Mode on Google devices when others are around, disable voice purchasing on both platforms, and keep personal accounts off a speaker that lives in a common area. If a roommate wants their own account on a shared device, use household/multi-user profiles instead of one shared login.

Should I worry about a smart speaker a previous tenant left behind?

Yes. Don’t just start using it — factory reset it first, since it may still be logged into the previous tenant’s account and could give them ongoing access to your home’s audio and routines. If it’s unclear whether it belongs to your landlord or a past renter, it’s safer to unplug it and use your own instead.

Does a guest Wi-Fi network actually make a difference for smart speaker security?

Yes. It doesn’t change what data Amazon or Google collects, but it isolates your IoT devices from your personal devices at the network level. If a smart bulb or plug — often the weakest-secured device in a smart home — is ever compromised, segmentation stops that compromise from spreading to your laptop or phone.

The Bottom Line

Smart speakers aren’t secretly recording everything you say — but they send more to the cloud than most people realize, and the default settings favor Amazon and Google’s convenience over your privacy. Meaningful control is still just a few taps away: delete your voice history, turn on auto-delete, lock down purchasing, use Guest Mode when you’re sharing space, and put your IoT devices on their own network. None of it requires drilling a hole or asking your landlord for permission — it’s fifteen minutes of settings changes for a home that’s noticeably more private, whether you’re living alone, splitting rent with roommates, or moving into a place that already has someone else’s tech installed.

Smart Speaker Privacy: A Renter’s Guide to Locking Down Alexa and Google Home