Privacy Policy

This Privacy Policy describes how Nietzschat collects, uses, and protects your personal information. By using the service you agree to the practices described here.

1. Information We Collect

Account information — your email address, collected when you sign up.

Usage data — messages you send, conversations you save, and sources you add to your Library.

Voice data — if you dictate a question, the audio recording is sent to our speech provider for transcription and is not stored by us (see Section 3). Using the microphone is always your choice.

Billing information — subscription plan status, and the customer and subscription identifiers our payment provider issues for your account. We never see or store your payment card details; those are handled entirely by our payment provider (see Section 3).

Technical data — your IP address and basic request information, used only to operate the service, apply usage limits and prevent abuse.

2. How We Use Your Information

• To provide, maintain, and improve the Nietzschat service.
• To authenticate you and manage your subscription.
• To send transactional emails such as password resets. Billing receipts and invoices are sent by Lemon Squeezy as Merchant of Record, not by us.
• To enforce our Terms of Service and prevent abuse.

We do not sell or rent your personal information to third parties. We do not use your conversation content to train AI models.

3. Third-Party Services

Nietzschat relies on the following third-party processors. Each processes your data only as necessary to provide their service.

• Supabase — authentication and database hosting. Your email, conversations, and library are stored in Supabase.
• Anthropic — AI model powering responses. Conversation content is sent to Anthropic's API to generate replies. Anthropic's privacy policy applies.
• OpenAI — text embeddings used for search. The text of your question is sent to OpenAI's embedding API so the relevant passages can be found. It is used for retrieval only, never to generate an answer. OpenAI's privacy policy applies.
• ElevenLabs — speech. Used only when you choose to dictate a question or have an answer read aloud. Dictated audio is sent for transcription and the text to be spoken is sent for synthesis; neither is stored by us. If you do not use the microphone or the playback control, nothing is sent. ElevenLabs' privacy policy applies.
• Lemon Squeezy — payment processing. Lemon Squeezy LLC acts as Merchant of Record for Nietzschat: it is the seller of record for your subscription and handles payment processing, tax collection, invoices and refunds. Its own terms and privacy policy govern data collected during checkout and in the customer portal.
• Vercel and Render — application and API hosting. They process requests to the service in order to deliver it.

4. Cookies and Local Storage

We use browser local storage for interface preferences (for example your theme and German glossary settings) and Supabase Auth cookies to keep you signed in.

We also set one strictly necessary first-party cookie, nz_guest. It holds a random, signed identifier — no name, email or IP address — and exists solely to count the free daily question allowance for visitors who are not signed in. Without it that allowance could not be enforced. It is HttpOnly and SameSite=Lax, so it cannot be read by page scripts and is not sent on cross-site requests, which means it cannot be used to track you on other websites.

We do not use third-party tracking, analytics or advertising cookies.

5. Data Retention

Your account data is retained for as long as your account is active. You may request deletion of your Nietzschat account and associated personal data by emailing contact@nietzschat.com. Once your account is deleted, your personal data is removed within 30 days, except that certain transaction and accounting records (such as records of purchases) may be retained where necessary, including where required by law.

6. Your Rights

Depending on your jurisdiction, you may have the right to access, correct, port, or delete your personal data. To exercise these rights, email us at contact@nietzschat.com.

7. Security

We use industry-standard security measures including TLS encryption in transit and access-controlled database hosting. No method of internet transmission is 100% secure; we cannot guarantee absolute security.

8. Children's Privacy

Nietzschat is not directed at children under 16. We do not knowingly collect personal information from anyone under 16. If you believe we have inadvertently collected such information, contact us and we will delete it promptly.

9. Changes to This Policy

We may update this Privacy Policy. We will notify you of material changes via email or a notice in the service before they take effect.

10. Contact

Privacy questions or requests? Email contact@nietzschat.com.