I take security very seriously. Your credit card information is never sent to my server; it goes directly to Stripe.com via an embedded iFrame hosted by Stripe. I NEVER store any credit card details in my database. If you would like the last four digits of your card on the invoice, add them to the "Company Info" field.
Your name, email address, and company information. The price and number of users you selected. Your billing address, postal code, and IP address. I do NOT store any credit card information in my database.