It's so safe, we can't even see it ourselves. We rely on a card processing company called Stripe -- look them up, they've never had any security breaches! When you enter your credit card, your browser submits it directly to Stripe, who issues us a code that might look like card_19qB63Fz9EvJ1lWQainKDChx. Then, every month, we just ask them to charge that code for your bill amount. This means we can bill you monthly until you cancel without ever knowing what your card number is!