You can rest assured that your card details are safe. We don't store card details on our servers, we use Stripe to securely accept and store your card data. Stripe has been audited by a PCI-certified auditor and is certified to PCI Service Provider Level 1; the most stringent level of certification available in the payments industry. Stripe forces HTTPS for all services using TLS (SSL). All card numbers are encrypted at rest with AES-256. Decryption keys are stored on separate machines. None of Stripe's internal servers and daemons are able to obtain plaintext card numbers; instead, they can just request that cards be sent to a service provider on a static whitelist. Stripe's infrastructure for storing, decrypting, and transmitting card numbers runs in separate hosting infrastructure, and doesn't share any credentials with Stripe's primary services (API, website, etc.). You can verify Stripe, Inc's service provider status over at VISA: https://www.visa.com/splisting/searchGrsp.do?companyNameCriteria=stripe,%20inc