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Privacy Policy

Last updated: March 20, 2026

1. What We Collect

We collect the minimum data necessary to operate the service:

  • Lightning public key — your authentication identifier, derived from your Lightning wallet. We do not collect email addresses or real names.
  • Uploaded images — images you upload, plus AI-generated metadata (captions, tags, text extraction).
  • IP address — recorded at upload time for legal compliance and abuse prevention only. Not used for tracking or advertising.
  • Wallet transactions — internal ledger of zaps, deposits, and withdrawals associated with your account.

2. What We Don’t Collect

  • No email addresses or real names required
  • No third-party analytics or tracking scripts (currently)
  • No cross-site tracking cookies (currently)
  • Original filenames are stripped at upload — we do not store them

3. How We Use Your Data

  • Authentication — LNURL-auth verifies your Lightning key pair
  • Content serving — displaying, searching, and recommending images
  • AI moderation & tagging — automated content analysis for search quality and safety
  • Legal compliance — NCMEC reporting when required by law (see Terms of Service)

4. Lightning Wallet

MemeStack maintains a custodial sats balance for your account. Deposits and withdrawals are processed through the Blink Lightning API. Your transaction history (zaps, deposits, withdrawals, transfers) is stored in our database. Blink processes Lightning payments on our behalf — refer to Blink’s Privacy Policy for their data handling practices.

5. Cookies & Advertising

MemeStack currently does not use third-party cookies or ad tracking. When our advertising partner is activated, they may set cookies for ad targeting and measurement. You can manage cookies through your browser settings. We will display a cookie consent notice when advertising is enabled.

6. Data Retention

  • Images are retained while your account is active and removed upon your request, except where legally required (e.g., content subject to a NCMEC report cannot be deleted).
  • IP addresses are retained for legal compliance only.
  • Account data is removed on request.
  • Wallet transaction history is retained as long as your account exists.

7. Data Sharing

We do not sell your data. We share data only when required by law:

  • Law enforcement — NCMEC/CSAM reporting as legally mandated
  • Advertising partner — anonymized impression and click data only, when ad network is activated

8. Children

MemeStack is not intended for users under 18. We do not knowingly collect personal data from minors.

9. Changes

We may update this policy at any time. Continued use of the service constitutes acceptance of the updated policy.

10. Contact

For privacy-related questions or data removal requests, email us at contact@memestack.ai.