PCI DSS-compliant software and payment integration
The cheapest PCI audit is the one where card data never touches your systems. We design payment architectures around that principle, then build the surrounding application to PCI DSS expectations for access control, logging, and secure development.
Scope reduction first
The architecture decision that matters most happens before any code is written.
- Hosted payment fields and processor-hosted checkout
- Tokenized cards for recurring and card-on-file payments
- No PAN storage, logging, or transmission through your servers
- Payment-page script inventory and tamper detection (req. 6.4.3 & 11.6.1)
- Network segmentation when card data environments are unavoidable
Secure-by-default application controls
MFA for administrative access, least-privilege roles, secure SDLC practices, dependency scanning, and change management that line up with PCI DSS v4.0.1 requirements.
Support at assessment time
We document data flows and controls to help you complete the right Self-Assessment Questionnaire or support a QSA assessment.
A note on responsibility: compliance is shared between your organization, your vendors, and your development partner. We engineer and document the technical safeguards; we are not a law firm or a qualified security assessor, and we’re glad to work alongside yours.
PCI DSS Payment Security: common questions
Don’t see your question? Ask a senior engineer directly.
Does using Stripe make me PCI compliant?
It significantly reduces your scope, but every merchant still has PCI responsibilities. Stripe Checkout or Elements can make you eligible for SAQ A, one of the simplest Self-Assessment Questionnaires, but you still validate annually and remain responsible for controlling scripts on your payment pages under PCI DSS v4.0.1.
What is the difference between SAQ A and SAQ A-EP?
SAQ A generally applies when all card data entry is fully outsourced to the processor (for example, hosted pages or iframes). SAQ A-EP applies when your website affects the security of the payment page even though the processor receives the card data. Architecture choices determine which applies.
What changed in PCI DSS 4.0.1?
PCI DSS v4.0.1 is the current version. Its future-dated requirements became mandatory on March 31, 2025, including broader multi-factor authentication and two payment-page controls — 6.4.3 (inventory and authorize every script on the payment page) and 11.6.1 (detect unauthorized changes to it). Those two apply even to many merchants using hosted payment fields.
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