Is Gemini private? What Google keeps and who can read it

Gemini is private from other people, but not from Google. By default Google saves your Gemini chats for 18 months, uses them to train its AI models, and lets human reviewers read a sample of them, and you can switch the saving and training off with one setting called Keep Activity.

That one setting does most of the work, but not all of it. Below is what Google's own Gemini Apps Privacy Hub says happens to a chat, checked on November 11, 2026, and the switches that change it.

What Gemini saves by default

If you are signed in to a personal Google Account and you are 18 or over, Keep Activity is on by default, according to Google's activity help page. With it on, Google saves:

• your chats and anything you share with Gemini, like uploads, photos and screens
• audio, Gemini Live videos and screenshares
• feedback, info from websites you visit with Gemini, and product usage
• location info: your device's general area, your IP address, or the Home and Work addresses in your Google Account

Google says this activity is used "to provide, develop, and improve its services (including training generative AI models)." It is also used to personalize Gemini, depending on your settings and region.

There is one thing Google says it does not do. The hub states: "Your Gemini Apps chats are not being used to show you ads. If this changes, we will clearly communicate it to you."

How long Google keeps your Gemini chats

There are three different clocks, and most people only know about the first one.

The third row is the one that surprises people. Google says chats reviewed by human reviewers "are not deleted when you delete your activity. Instead, they are retained for up to three years," together with related data like your language, device type and location info. Deleting your history removes the copy in your account, not the copy a reviewer already has.

Can a human at Google read your Gemini chats?

Yes, a subset of them. Google says reviewers, "including Google's trained service providers," read some chats to judge whether answers were low quality, inaccurate or harmful, and to write better ones. Chats are also reviewed for safety and for breaches of Google's terms.

Google says chats are "disconnected from your account before being sent to service providers." That only helps if you kept your name, address and other details out of the chat itself. Google's own advice is plain: "Please don't enter confidential information that you wouldn't want a reviewer to see or Google to use to improve our services."

Turning off Keep Activity stops your future chats being reviewed to improve Google's services. It does not stop all review. Google says that even with Keep Activity off or in a temporary chat, it "still uses your chats to respond to you and help protect Google, our users, and the public, including with help from human reviewers."

How to make Gemini more private

These steps use the names on Google's help pages as of November 11, 2026.

1. Turn off Keep Activity

1. On a computer, go to gemini.google.com.
2. Click Settings & help, then Activity.
3. Near the top, click On, then Turn off, or Turn off and delete activity to also clear what is already saved.

On a phone, you can open myactivity.google.com/product/gemini in any browser and do the same. After this, your future chats stay out of your activity and are not used to train Google's models unless you send feedback. They are still kept for 72 hours.

2. Or keep history, but shorten it

If you like having your chat history, change the auto-delete period instead. On the same Activity page, click Deleting activity older than ... months (or Choose an auto-delete option), then pick 3, 18 or 36 months. Three months is the shortest Google offers. Note that this keeps training on: it only limits how long chats stay in your account.

3. Delete what is already there

On the Activity page, click Delete and choose All time, Last hour, Last day or Custom range, or delete a single item. If you ever shared a chat with a public link, Google says deleting the chat does not delete the link, so remove the link separately.

4. Use a temporary chat for sensitive questions

Next to New chat, click Temporary chat. Google says these chats do not appear in your activity or recent chats, are kept for 72 hours, and "are not used to train Google's AI models." The trade-off: no Gems, no personalization, and no Connected Apps that need Keep Activity. They work on personal accounts in the Gemini web and mobile apps, per Google's temporary chat page.

Gotchas Google mentions further down the page

• The thumbs-down sends more than you think. If you send feedback, Google collects "the last 24 hours of your chats" as context, including uploads and data from connected apps. Reviewed feedback is kept for up to 3 years. This applies even with Keep Activity off.
• Imported chats are training data. If you import chats or memory from another AI service, Google says that data is used "including to improve our services (including training generative AI models)."
• Voice and video have their own switch. Your audio and Gemini Live video and screenshares are not used to improve Google's services by default. A separate box on the Activity page turns that on, so leave it unticked if you want it off.
• Other Google settings keep running. Changing your Gemini settings does not change Web & App Activity, Search history or Timeline, which "may keep saving location and other data."
• "Hey Google" can start by accident. Google says Gemini can activate from a noise that sounds like the wake word, and audio recording "may begin a few seconds before activation."

What about Gemini in Gmail and Google Docs?

That is a different product with different rules, and it is where a lot of confusion comes from. The Ask Gemini panel inside Gmail, Docs, Drive and the other Workspace apps needs an eligible Google AI plan or a work account, per Google's Gmail and Docs help pages.

For Google AI plan users, Google's data protection page says Gemini in those apps "doesn't use your content to train or improve Gemini or other generative AI models" and "doesn't store your prompt or the generated output without your permission." The exception: if you share Gmail or Drive data with the Gemini app through Personal Intelligence, or through screenshots, it falls under the Gemini app's rules above and "may be used for model training and improvement."

We cover the Gmail side in detail, including smart features and how to switch each one off, in does Google AI read my Gmail?

Is Gemini private on a work or school account?

More private from Google, less private from your employer. Google's Workspace AI privacy hub says chats and uploads on a work account "won't be reviewed by human reviewers or otherwise used to train generative AI models outside of your domain without your permission."

Your organization is in charge, though. Admins decide whether chats are saved and for how long (3, 18 or 36 months, with 18 as the default), can turn Gemini off, and have audit logs of Gemini activity in the Gemini app and in Gmail, Docs, Drive and the other apps. Temporary chats are not available on work or school accounts. Treat a work Gemini the way you treat work email: your employer can see more than you might expect.

Frequently asked questions

Does Gemini save deleted chats?

It removes them from your account, but not everywhere. Google says chats already picked for human review are kept for up to 3 years after you delete your activity, and some usage data stays until you delete your Google Account.

Does Gemini train on temporary chats?

No. Google says temporary chats "are not used to train Google's AI models." They are still kept with your account for 72 hours to answer you and for safety.

What does "Gemini Apps Activity is off" mean?

It means Keep Activity is off. Your new chats are not saved to your history, are not used for training unless you send feedback, and are deleted after 72 hours. Some connected apps, including Google Workspace, stop working until you turn it back on.

Does Google use my Gemini chats for ads?

Google says no, for now: "Your Gemini Apps chats are not being used to show you ads," and it says it will tell you if that changes.

Is Gemini safer for privacy than other AI chatbots?

They all handle this differently, and the settings change often. The useful check for any chatbot is the same three questions: does it train on chats by default, do humans review them, and how long does it keep them. For Gemini the answers are yes, yes and 18 months, all of which you can change. For another way a big tech company handles AI and your data, see Apple's Private Cloud Compute.

Keeping your inbox out of it

The simplest rule for any AI chatbot is not to paste in what you would not want a stranger to read, like bank details, health records or someone else's private message. Your email is often where that kind of information lives in the first place.

If you would rather keep your mail away from ad-funded AI entirely, Secria Mail has no ads and Secria never mines your mail. Your mailbox is locked with a key made from your password, on your device, and signing up needs only a name, the address you want and a password, with no phone number.