← Back to Home

Privacy Policy

Effective Date: January 10, 2026

Mark Twain AI ("marktwain.io," "we," "us," or "our") respects your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our website and services.

1. Information We Collect

Account Information: When you create an account through Clerk (our authentication provider), we receive your email address and basic profile information. We do not store passwords directly.

Usage Data: We collect information about how you use our service, including:

  • Text generation requests (prompts you submit)
  • Selected periods and relationship modifiers
  • Generation counts for rate limiting
  • Timestamps of your interactions

Technical Data: We automatically collect certain technical information, including:

  • IP address
  • Browser type and version
  • Device information
  • Pages visited and time spent

2. How We Use Your Information

We use collected information to:

  • Provide and maintain the Mark Twain AI service
  • Process your text generation requests
  • Enforce rate limits and prevent abuse
  • Improve and optimize our service
  • Communicate with you about service updates
  • Comply with legal obligations

3. Data Storage and Retention

Rate Limiting Data: Your daily generation counts are stored in Vercel KV (Redis) and automatically expire at midnight UTC each day.

Generation History: We may retain a history of your generation requests to provide you with access to past outputs. You may request deletion of this history.

Account Data: Account information is retained as long as your account is active. You may request account deletion at any time.

4. Third-Party Services

We use the following third-party services that may collect and process your data:

Clerk: Authentication and user management. See Clerk's Privacy Policy at https://clerk.com/privacy

Vercel: Hosting and infrastructure. See Vercel's Privacy Policy at https://vercel.com/legal/privacy-policy

Anthropic: AI model provider (Claude). Your prompts are sent to Anthropic for processing. See Anthropic's Privacy Policy at https://www.anthropic.com/privacy

5. Data Sharing

We do not sell your personal information. We may share your information only in the following circumstances:

  • With service providers who assist in operating our service (as listed above)
  • To comply with legal obligations or respond to lawful requests
  • To protect our rights, privacy, safety, or property
  • In connection with a merger, acquisition, or sale of assets

6. Your Rights and Choices

Depending on your location, you may have the following rights:

  • Access: Request a copy of the personal data we hold about you.
  • Correction: Request correction of inaccurate personal data.
  • Deletion: Request deletion of your personal data and account.
  • Portability: Request a portable copy of your data.
  • Objection: Object to certain processing of your data.

To exercise these rights, contact us at gentian.inlay0g@icloud.com.

7. Security

We implement appropriate technical and organizational measures to protect your personal information. However, no method of transmission over the Internet or electronic storage is 100% secure. We cannot guarantee absolute security.

8. Children's Privacy

Mark Twain AI is not intended for children under 13 years of age. We do not knowingly collect personal information from children under 13. If you believe we have collected information from a child under 13, please contact us immediately.

9. International Data Transfers

Your information may be transferred to and processed in countries other than your own, including the United States. These countries may have different data protection laws. By using our service, you consent to such transfers.

10. Cookies and Tracking

We use essential cookies for authentication and session management. We do not currently use advertising or analytics cookies. You can control cookies through your browser settings.

11. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of material changes by posting the new policy on this page and updating the effective date. Your continued use of the service after changes constitutes acceptance.

12. Contact Us

For questions or concerns about this Privacy Policy or our data practices, please contact us at:

Email: gentian.inlay0g@icloud.com

Website: https://marktwain.io

13. California Privacy Rights

If you are a California resident, you have additional rights under the California Consumer Privacy Act (CCPA), including the right to know what personal information we collect and how it is used, and the right to request deletion. Contact us to exercise these rights.

14. European Privacy Rights

If you are in the European Economic Area (EEA), you have rights under the General Data Protection Regulation (GDPR). Our legal basis for processing your data includes your consent, contract performance, and legitimate interests. You may lodge a complaint with your local supervisory authority.