Private preview · 6 October 2026
This page lists everything Noocene keeps, where it is kept and for how long, and everything it sends to other companies: on noocene.ai, the home page, and on app.noocene.ai, where the minds answer. It describes the private preview. A full privacy policy will replace it before Noocene opens to the public.
Conversations. The app does not save your questions or the minds' answers. For each question it records the time, the mind, the model that answered, the number of tokens and web searches, the cost, and what the question took from your allowance: never its words. The conversation itself lives only in the open page: reload or close it and it is gone. Questions asked in the earlier preview chat on noocene.ai, until 6 October 2026, were saved in daily log files on noocene.ai's server, with the answers but without any name, IP address or cookie. Those files are still there; a deletion date has not been set.
The preview password. Both sites sit behind the preview password. On noocene.ai a signed cookie remembers it for up to seven days, and the server notes each sign-in, sign-out and refused password with the time, your IP address and your browser's name, to protect the site; that record has no end date yet. On app.noocene.ai a signed cookie remembers it for 30 days. On both, failed tries are counted against a hashed form of your IP address, to stop password guessing; old counts (more than 15 minutes old on noocene.ai, more than a day on app.noocene.ai) are cleared as new tries come in.
Your account. To ask a mind you sign in on app.noocene.ai with your email address and a nickname (what your friends call you). The app keeps both, a random account number, your plan, and when the account was made, in Supabase, a database service, on its servers in Tokyo. The sign-in link works once and only for a limited time. To stop abuse, links asked for are counted against hashed forms of your address and your IP address, kept for 24 hours. The email with the link greets you by your nickname and is sent through Resend, an email service based in the United States. A cookie then keeps you signed in on that device until you sign out or the session ends. Your nickname is also shown on My account, and a mind may call you by it (see The model below). Your address and nickname are used for nothing else: no newsletter, no sharing. To have your account deleted, write to hello@noocene.ai.
Questions, voice time and payments. The same database counts what you were given (the monthly free allowance, a plan, a pack or a gift code, with the code and when you used it) and what each answer used: a question for a written answer, seconds of voice for a spoken one, and a daily count of characters spoken per account. These counts hold no text. When you buy a plan or a pack, you pay on Stripe's own checkout page and Noocene never sees your card. Stripe receives your email address and account number; Noocene keeps the Stripe customer number, your plan, its status and its renewal date.
Hosting. noocene.ai is hosted by Hostinger, whose servers keep standard access logs: the IP address, page and time of each request, under Hostinger's own policy. app.noocene.ai runs on Vercel, a company based in the United States; the app's server functions run in Tokyo, and Vercel keeps request logs under its own policy. The app's own technical log notes errors and counts, never your questions.
In your browser. Cookies that remember the preview password and keep you signed in, and one setting in your browser's local storage: light or dark. There are no other cookies, no analytics, no advertising and no third-party scripts or fonts.
Memory. The minds remember nothing between visits. Within an open page, each model receives only its own last six exchanges with you, so that it can follow the conversation; no model sees another model's answers. Nothing you say changes how a mind answers anyone else.
The model. To write an answer, the model you chose with the switch above the question box receives your question, the passages found in the archive, its own last six exchanges with you, and the brief that describes the person. Claude Opus and Claude Sonnet are reached through Anthropic's Claude API, in the United States. Mistral Medium and GLM 5.3 are reached through the API of Mistral AI, a French company. GLM 5.3 is an open-weight model made by Z.ai, in China; Mistral states that it hosts the model itself, on the same infrastructure as its own models. If the model you chose does not respond, another answers, and a line under that answer says so. The model receives nothing else about you, except that it may be given your nickname, so that the mind can call you by it. Your email address and account number never reach a model. For events after the person's death, the model may also run a web search through the same company; the search receives the words the model chooses, not your question as you asked it.
Training. Nothing you ask here is used to train Anthropic's or Mistral's models. Anthropic's commercial terms do not allow it to train on what its API receives. On Noocene's Mistral account, the option that lets Mistral train on API calls is switched off, and every call also asks Mistral not to store the conversation. Questions to GLM 5.3 go through Mistral under the same terms and the same setting. The team's own Anthropic account has "Help improve our AI models" switched off too. Anthropic deletes what it receives within 30 days, unless its safety systems flag it. Mistral keeps it for 30 days to watch for abuse. Why this matters: a conversation with a mind can show what you are thinking about. It should serve only to write your reply, never to teach a model that other people will use.
Speaking a question. The Chat button and the microphone use your browser's own speech recognition, which may send the audio to the company that makes your browser. Noocene never receives audio, only the text that ends up in the question box.
Hearing an answer. When you press Listen, or talk with a mind by voice, the text of its answer is sent to Inworld, a text-to-speech service in the United States, which returns it as audio in a synthetic voice cloned from the person's recordings. Only the answer's words are sent, never your question; when the mind has called you by your nickname, the nickname is among those words. Noocene keeps no copy of the audio. How long Inworld keeps the text it receives has not been checked yet.