flaw.co gives you a free external scan and a letter grade on your public attack surface in minutes. Paying.co's senior testers take it from there — internal segmentation, CDE isolation, manual exploitation and reporting your QSA and card-brand programs can actually use.
flaw.co tells you what an attacker can see from the outside. A full penetration test tells you what they could actually do with it. We built both, and we are explicit about where one ends and the other begins.
Passive, non-intrusive review of TLS, headers, exposed services and information disclosure. You get a letter grade, category scores and unredacted findings.
Active vulnerability testing on domains you have verified you control, including CVE detection, exposed path discovery and misconfiguration testing.
Internal networks, segmentation and CDE isolation, lateral movement, chained exploits and business-logic attacks — plus the PCI DSS 11.4 evidence a scanner cannot generate.
No sales call, procurement cycle or credit card. Enter a domain, confirm you're authorized to scan it and get your grade. Most teams find something in the first run.
Every plan includes the full passive external scan. Upgrade for active deep testing, unlimited runs, and continuous monitoring — or buy a single deep scan for one domain.
A Paying.co penetration test covers the rest of the estate — and the parts of PCI DSS 11.4 that require a human tester, a documented methodology and evidence a QSA will accept.
Lateral movement, privileged paths and validation of the isolation your PCI scope depends on.
Internal enumeration, service exploitation and validation of network controls.
OWASP Top 10, auth bypasses, API testing and chained business-logic flaws.
Static and runtime analysis, certificate pinning, secure storage and reverse engineering.
IAM, exposed storage, security groups, configuration and infrastructure-as-code hardening.
Rogue AP detection, WPA weakness testing and guest-to-corporate isolation.
Phishing, vishing and pretexting to test the people and process layer.
Evidence aligned to PCI DSS 4.0 11.4.x and the card-brand programs layered on top.
The two layers work together, but they answer different questions.
Fast, repeatable external posture checks designed to establish a baseline and detect drift.
Human-led testing of internal, application and business-logic paths that automated tools cannot reason through.
Focused tests typically land in 2–4 weeks. Full external + internal + segmentation engagements generally run 6–10 weeks from kickoff to retest.
Start on your own and see the external findings before talking to anyone.
Map the findings against PCI and card-brand obligations and return a fixed scope.
Map the full attack surface, internal estate, applications and cloud configuration.
Validate impact through chained vulnerabilities, segmentation gaps and business logic.
Scope, methodology, findings, evidence and sequenced remediation in one package.
Validate remediation, then keep the perimeter under continuous flaw.co monitoring.
Start with flaw.co — it costs nothing and takes minutes. When you're ready to scope the full engagement, you'll talk directly with a senior tester.