Privacy Policy

Last updated: 8/21/2025

1. Information We Collect

We collect information you provide directly to us when you use SubjectLine.app, including when you create an account, test subject lines, subscribe to our Pro plan, or contact us for support.

  • Account information (name, email address, password)
  • Subject line test data and AI recommendations
  • Voting feedback on AI suggestions
  • Payment information (processed securely through Stripe)
  • Usage data and analytics
  • Communication preferences

2. How We Use Your Information

We use the information we collect to:

  • Provide AI-powered subject line testing and optimization
  • Improve our AI algorithms based on your voting feedback
  • Process transactions and manage your Pro subscription
  • Send technical notices, updates, and support messages
  • Respond to your comments and questions
  • Monitor and analyze usage patterns to improve our service

3. Information Sharing

We do not sell, trade, or otherwise transfer your personal information or subject line data to third parties except as described in this policy:

  • With your consent
  • To comply with legal obligations
  • To protect our rights and safety
  • With service providers who assist in our operations (OpenAI for AI processing, Stripe for payments)

4. Data Security

We implement appropriate security measures to protect your personal information and subject line data against unauthorized access, alteration, disclosure, or destruction. Your subject line tests are stored securely and are only accessible to you.

5. Your Rights

You have the right to:

  • Access your personal information and subject line test history
  • Correct inaccurate information
  • Request deletion of your information and test data
  • Export your subject line test data
  • Opt out of marketing communications
  • Cancel your Pro subscription at any time

6. Cookies and Tracking

We use cookies and similar technologies to enhance your experience, analyze usage patterns, and provide personalized AI recommendations for your subject lines.

7. Changes to This Policy

We may update this privacy policy from time to time. We will notify you of any changes by posting the new policy on this page and updating the "Last updated" date.

8. Contact Us

If you have any questions about this privacy policy or how we handle your subject line data, please contact us at:

Email: privacy@subjectlines.app
Website: https://subjectlines.app