Is AI private?

Tessera is a private AI memory app. It is not an AI itself. It is the memory layer between you and whichever AI you use, which means the memory belongs to you rather than to a model.

The short version

• Your conversations do not train AI. Tessera never uses your conversations or your memory to train anything of our own, and your questions reach the AI models on business tiers where conversations are not used to train the models by default.
• The AI company never learns who you are. Your question reaches the AI model with no name on it, no email address, and no account for it to file the answer under.
• We have no ads business. Subscriptions are the whole business model, so there is no ad product your data could be sold to power.
• Nothing about you is a black box. Your memory opens like a settings page. You see everything that is known, and you can read every line, change it, add to it, or erase any of it at any time. Nobody at Tessera reads it to run the product, and the most sensitive parts are scrambled with a key belonging to your account alone, so our own view of the database shows nothing readable.
• You can take it or erase it at any time. Request a full copy of your data, delete a single fact, or delete the whole account. Deletion is real deletion.

Does AI train on my data?

Not through Tessera. We never use your conversations or your memory to train anything of our own.

When your question goes to an AI model, it goes under business terms rather than the consumer version of that product. That distinction matters more than most people realise. In the consumer apps, what you type can become training data by default. On the business tiers we use, the default is that it does not.

This is the question people ask most often, and it deserves a direct answer rather than a paragraph of hedging: your words are used to answer you, and they are not used to teach anything.

One honest footnote, because “not trained on” and “not kept” are two different promises and it is easy to blur them. Most of the models we send questions to keep nothing at all afterwards. One of them keeps a record of activity for up to thirty days so it can catch people abusing its service, and then deletes it. We would rather tell you that than round it off. The full privacy policy sets out exactly which is which.

A second footnote for the same reason. To find the right facts to bring to a question, Tessera turns your saved facts into a mathematical index, and that step runs through a specialist provider rather than on our own hardware. Their standard terms are not as strict as the ones covering the AI models above. We are moving that step onto terms that match, and until we have, we would rather name it here than let “nothing is used for training” cover something it does not.

Who can see what Tessera remembers?

You can, completely. Your memory is not a black box: it opens like a settings page, one fact at a time, and you can read every line of it.

When you ask a question, the relevant pieces of that memory travel with the question to the AI model answering it, under the business terms above. Not all of it, every time. Just what is relevant to what you asked.

What does the AI company learn about me?

Nothing that identifies you.

This is the part most people assume works the other way around. When you use an AI app directly, everything you type is attached to your account there, kept on their side, and used to build a picture of you that you cannot open. Your name is on the file because your account is the file.

Through Tessera, your question arrives at the AI model with no name on it, no email address, and no account to connect it to. The model reads what it needs, answers, and has nothing to file the answer under. It cannot recognise you tomorrow, because it never knew you today.

Tessera holds the identity. The model does the thinking. Neither one has the whole picture, and only you do.

Worth being precise about the limit of this, because it is your side of the bargain rather than ours: it is about identity, not about content. If you type your own name or your address into a question, the model reads the words you wrote. What it never receives is the account they belong to.

What can I check for myself?

All of it. Every fact Tessera holds is listed in the app, in plain language, grouped the way you would expect. You can read the whole thing in a sitting.

If something is wrong, edit it. If you never want it used again, delete it, and it stops travelling with your questions from that moment. Most products ask you to trust a policy page. This is the part that lets you check instead.

Can I delete what AI knows about me?

Yes, at two different sizes:

• One fact. Find it in your memory and delete it. It stops travelling with your questions immediately.
• The whole account. Delete the account and the data goes with it.

Deletion means the record is gone, not moved into an archive you cannot see. You can also request a full copy of your data at any time, and we send it to you.

Why a memory layer is more private than memory inside one AI app

When memory lives inside a single AI product, you generally cannot see all of it, cannot move it, and cannot take it with you when you leave. It is a feature of their product, held on their side.

Tessera keeps that memory on your side of the conversation. It is visible, editable, portable across AI models, and deletable, and it is the same memory no matter which model you are talking to today.

What we collect, and why

What you choose to tell Tessera about yourself, the conversations you have through it, and the ordinary account details needed to run a subscription. If you connect a calendar, the events you allow it to read. That is the working set, and it exists so that answers fit your life instead of being written for nobody in particular.

We do not buy data about you from anyone else to fill in gaps.

Questions we get asked