Backblaze is a PCI compliant company.
Attached to this article is the SAQ A report for Backblaze, in case you or your company needs access to the document.
Backblaze uses Stripe as our 3rd party payment processor. When you enter your credit card information to purchase a Backblaze product or service, that information goes directly to Stripe for processing. Your credit card number is not processed or stored on Backblaze systems.