Built for the side your audit sits on.
StringIO is pre-GA and we say so. Here are our controls and our compliance posture as they stand today, written as status and targets, not earned badges.
controls designed, audit underway
scope stays at the platform edge
named under NDA once secured
no claim we can't back
PAN never crosses your stack
Card data is tokenized at the platform edge. Your systems handle tokens, not PANs. PCI scope stays at the platform boundary, not in your application.
Fail-closed by default
Every guard refuses rather than clamps. A bad request errors instead of silently settling wrong. Idempotency on every write makes retries safe and intent exactly-once.
A signed, replayable close
A cryptographically-signed daily attestation, deterministic and replayable across the full chargeback and restatement tail. Every disputed event reconstructs to a one-click evidence pack.
Compliance in the authorization
OFAC, AML, 3DS and Reg-E timers run inside the auth path, not as an afterthought. Every action writes to an immutable governance ledger.
Talk to our security team.
Want the detail? We'll walk your security and compliance team through the architecture and the roadmap. Ask for the security overview.