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When you subscribe to the newsletter: your email address and optionally your name.
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When you make a payment: your email address is passed to Stripe. We do not store your card details — Stripe handles all payment processing.
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Usage data: we track how many oracle questions and game rounds you use per session, keyed to an anonymous session identifier. We do not link this to your identity.
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Server logs: standard web server logs including IP address and page visits, retained for 30 days for security purposes.
What We Don't Collect
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We do not sell, rent, or share your personal data with third parties for marketing purposes.
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We do not run advertising networks or install tracking pixels.
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We do not require account creation. There is no password database.
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The oracle conversations you have are sent to Anthropic's API for processing. We do not store the content of your oracle conversations.
Cookies
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If you purchase access (Oracle+ or Supporter), we store a single authentication cookie called "oracle_access" containing a random token. This is used only to recognise your paid access. It contains no personal information.
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Session cookies are used to track free-tier usage limits. These are temporary and expire when you close your browser.
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We do not use advertising cookies or third-party tracking cookies.
Third-Party Services
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Stripe: processes payments. Their privacy policy is at stripe.com/privacy.
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Anthropic: powers the oracle and game features. Queries are sent to their API. Their privacy policy is at anthropic.com/privacy.
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Brevo (formerly Sendinblue): sends transactional and newsletter emails. Their privacy policy is at brevo.com/legal/privacypolicy.
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Google Fonts: fonts are loaded from Google's CDN. Their privacy policy is at policies.google.com/privacy.
Newsletter
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If you subscribe to The 13th Letter, your email is stored in our database.
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You can unsubscribe at any time using the link in any email we send.
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We will never send promotional emails from third parties to your address.
Your Rights
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You may request deletion of your data at any time by emailing hello@thenumber13.com.
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You may request a copy of the data we hold about you.
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If you are in the European Economic Area, you have additional rights under GDPR.
Contact
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For privacy questions or data requests: hello@thenumber13.com