CardGrind is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and protect your personal information when you use our platform.
CardGrind, LLC is a Delaware limited liability company operating cardgrind.com — a sports card portfolio tracking and market data platform for collectors and investors.
Information you provide directly:
Information collected automatically:
When you contribute transaction data to the CardGrind community price guide, your contribution becomes part of a collective dataset. Upon account deletion, your personal identifying information will be removed. However, anonymized transaction data you contributed may be retained to preserve the integrity of the community price guide. This anonymized data cannot be used to identify you personally.
| Service | Purpose | Privacy Policy |
|---|---|---|
| Supabase | Database and authentication | supabase.com/privacy |
| Lemon Squeezy | Payment processing | lemonsqueezy.com/privacy |
| Beehiiv | Newsletter and email marketing | beehiiv.com/privacy |
| Resend | Transactional email | resend.com/privacy |
| PostHog | Product analytics | posthog.com/privacy |
| Railway | Website hosting | railway.app/privacy |
| Sentry | Error monitoring | sentry.io/privacy |
| Cloudflare | CDN and security | cloudflare.com/privacypolicy |
We do not sell your personal information to any third party.
CardGrind uses cookies and similar tracking technologies to maintain your session, remember your preferences, and analyze platform usage. You can control cookies through your browser settings. Disabling cookies may affect certain platform features. For cookie-related questions contact us directly.
CardGrind offers incentive programs where users may receive contest entries or platform benefits in exchange for contributing verified transaction data. Participation in these programs is entirely voluntary. You may opt out at any time without affecting your access to the platform.
We retain your personal information for as long as your account is active. Upon account deletion:
We implement industry-standard security measures including SSL encryption, row-level security on our database, JWT authentication, and Cloudflare security protection. No method of transmission over the internet is 100% secure, and we cannot guarantee absolute security.
CardGrind is intended for users 18 years of age and older. We do not knowingly collect personal information from children under 18. If you believe a child has provided us with personal information, please contact us immediately at cardgrindapp@gmail.com.
Depending on your location, you may have the right to:
To exercise these rights, contact us at cardgrindapp@gmail.com. We will respond within 30 days.
California residents have additional rights under the California Consumer Privacy Act. We do not sell personal information. You have the right to know what personal information we collect, request deletion, and opt out of any sale (which we do not conduct). To exercise your California privacy rights, contact us at cardgrindapp@gmail.com.
CardGrind does not currently respond to Do Not Track signals from browsers, as there is no industry-standard approach to responding to such signals.
We send the CardGrind Market Brief newsletter and platform update emails to subscribers. You can unsubscribe at any time by clicking the unsubscribe link at the bottom of any email or by contacting us at cardgrindapp@gmail.com.
We may update this Privacy Policy from time to time. We will notify you of material changes by email. The updated policy will be effective upon posting. Continued use of the platform after notification constitutes acceptance of the updated policy.
For privacy-related questions, data requests, or to exercise your rights: