Privacy is the one category where the AI companion industry has, collectively, done badly. When Mozilla’s *Privacy Not Included researchers reviewed a batch of romantic AI chatbots, they attached a warning label to every single one — and described the category as among the worst they had ever assessed. That was a snapshot of a fast-moving market, and some apps have improved since. But it is the right starting assumption: nothing here is private by default, and the differences between apps are differences of degree.
This is our ranking of the mainstream AI companion apps by how they handle your data — what they collect, whether you can get it back or delete it, and how honest the privacy policy is about all of it. It is a comparison of the best of a difficult category, not a list of apps we would call genuinely private.
What we actually measured
Four things, in this order of weight.
- Whether your data is sold or shared for advertising. The single biggest split in the category. An app funded by subscriptions has a different incentive than one funded by ads.
- Whether deletion works. Not whether a delete button exists — whether requesting deletion actually removes your account and chat history, and whether you can export your data first.
- Policy transparency. Can you read the privacy policy and come away knowing what happens to your conversations? A surprising number of them are written so that you cannot.
- Third-party trackers in the app itself. Independent researchers have repeatedly found analytics and ad SDKs firing within seconds of opening these apps, sending data onward to companies you never agreed to talk to.
One thing we did not measure, because no mainstream app offers it: end-to-end encryption. Several apps advertise “encryption,” and they are telling the truth — your chats are encrypted in transit and at rest. But the company still holds the keys, because the model has to read your conversation history to generate a reply. Every app on this list can, technically, read your chats. Our explainer on how AI companion memory works covers why that is an architectural constraint rather than a corner being cut.
★★★★★ 4 / 5
✔ Policy states plainly what is stored and why
✔ Deletion request removes account and history
✔ Data export available
✔ Subscription-funded, not ad-funded
✘ No end-to-end encryption (as with all rivals)
✘ Deliberately light-touch moderation
✘ Staff access is technically possible
✘ No free tier to test privacy settings first
The ranking
1. Nomi — takes the top spot mostly on transparency. The policy is readable, the deletion process does what it claims, and export exists. Our Is Nomi safe? guide goes through the settings in detail, and the full Nomi review covers everything else.
2. Kindroid — close behind. Chats are encrypted in transit and at rest, the company states it does not sell user data, and full deletion is available on request. The catch is the same as Nomi’s: memory-first apps need continuous access to your history, so nothing is locked away from the provider. See Is Kindroid safe? and our Kindroid review.
3. Paradot — an interesting case. Its visible memory panel is a privacy feature by accident: you can see what the app has stored about you and edit it, which almost nothing else in the category offers. The surrounding policy is average, but being able to audit your own memory file is genuinely useful. Details in our Paradot review.
4. Character.AI — middling, and mainly because it is a large platform with the compliance staff to match. Age controls and moderation are more developed than most rivals. Against that, it is an advertising-adjacent business at scale, and your chats feed platform improvement. Our Is Character.AI safe? guide covers the specifics.
5. Replika — the app with the most regulatory history. Italy’s data protection authority restricted it over age verification and minor-safety concerns, and later issued a substantial fine. Replika has since tightened things considerably, and its current controls are reasonable. But a track record is a track record. See Is Replika safe? and the Replika review.
Bottom of the list: the ad-supported apps. Chai, Talkie and similar free-first apps sit lowest, not because they are careless but because the business model is the problem. An app that pays for itself with advertising has a structural reason to know things about you. We covered this in Is Chai AI safe?, and the same logic applies across the free-with-ads tier. If privacy is your main concern, paying for an app is the most direct improvement you can make — our free vs paid comparison weighs that up.
At a glance
| App | Funding model | Deletion & export | Privacy rating |
|---|---|---|---|
| Nomi | Subscription | Both, works as described | Best in category |
| Kindroid | Subscription | Deletion on request | Strong |
| Paradot | Freemium | Editable visible memory | Good |
| Character.AI | Freemium, at scale | Available | Average |
| Replika | Freemium | Available | Average, mixed history |
| Ad-supported apps | Advertising | Varies, often unclear | Weakest |
What you control, regardless of which app you pick
Your app choice matters less than your habits. Sign up with an email address you do not use elsewhere. Skip the social login — it links your companion account to your real identity for no benefit to you. Keep your employer, your street, your full name and anything financial out of the conversation entirely, no matter how naturally it comes up. Turn off any “improve the service with my data” toggle during onboarding rather than hunting for it later.
And know the exit before you need it. Uninstalling an app deletes nothing — the account and every conversation stay on the company’s servers until you formally request removal. Our step-by-step guide to deleting your AI companion data walks through the process, and do AI companion apps store your chats? explains what remains afterwards.
FAQ
Is any AI companion app truly private?
No. Every mainstream app stores your conversations on its own servers and can read them, because the model needs your history to generate a coherent reply. The realistic goal is choosing a provider that collects less, is honest about what it holds, and deletes it properly when asked.
Does paying for an app make it more private?
Usually, yes — though indirectly. A subscription removes the need to monetise attention or data, which is why subscription-funded apps consistently rank higher here. It is not a guarantee, but it changes the incentive in your favour.
Can staff at these companies read my conversations?
Technically, at every app on this list. Most restrict internal access to specific circumstances — safety investigations, debugging, legal requirements — but without end-to-end encryption the capability exists. Write accordingly.
The bottom line
If privacy is your deciding factor, Nomi and Kindroid are the two to look at first — both are subscription-funded, both handle deletion properly, and both are reasonably straight about their limits. Paradot is worth a look if being able to see and edit what the app remembers about you appeals. Whichever you choose, the assumption to carry in is that nothing you type is private in the way a text to a friend is private, and to write with that in mind from day one.
For rankings on everything other than privacy, see our 2026 roundup of the best AI companion apps, browse the full review index, or read the essential AI companion safety and privacy guide. New to the category? Start from the Complete 2026 Guide.