No. Your credit card information is never stored on our servers. In fact, we never even see it! Payments are handled by Stripe, one of the most secure and reputable payment processors in the world. They handle payments for Kickstarter, Facebook, Unicef, and 100,000+ other businesses, so security is their #1 priority, and they are fully PCI DSS compliant, with military-grade encryption, isolated servers for decryption, regular security audits, and so on. Here are the juicy details from Stripe.