Privacy

We keep this short because we keep very little.

What we store

• Memories you buy: the sponsor name, text, link, emoji or logo and, if you give it, your X handle. They are public by design.
• Your email (optional): used for your receipt and your private “My memories” link. Never shown publicly. A gift recipient's email is used once, to tell them, and kept with the memory.
• Payments: handled by Stripe. We store a Stripe session id, not your card details. Idea boosts work the same way.
• Chat: messages are sent to our AI provider (Anthropic) to generate a reply. We do not store your conversations. When the Brain admits it knows nothing about a topic, only the topic is recorded on the Gaps list, never the message or who asked. We count messages per IP address for a few minutes to limit abuse.
• Votes: to allow one vote per person we store a hashed key derived from your IP address, or the id of your memory if you are a sponsor. No raw IP is stored with a vote.
• Cookies: after a purchase, a signed cookie marks your browser as a sponsor so the shared daily chat cap does not apply; it contains only a memory id, an expiry and a signature. If you arrive through an invitation link, a cookie remembers who invited you for 30 days.
• Letters: if you subscribe, your email, until you unsubscribe (every letter has a link) or ask us to remove it.
• Support and grant applications: what you type in the form, your email and, for support, your IP address for an hour to limit abuse. Grant applications we accept are published with the project name, country, summary and plan; your email stays private.
• Usage totals: daily counts of messages and AI tokens, without personal data, published on the Transparency page.

What we do not do

No advertising trackers, no selling of data, no newsletters unless you ask for one. Links in memories are published as submitted, with tracking parameters removed.

Your rights

Memories are permanent by contract, but you can ask us to anonymise the sponsor name or remove a link. Write to us through the Support page or at milliondollarbrain@proton.me. You can also ask us to delete your email, unsubscribe you from the letters, or remove a logo.