Penetration Testing as a Service (PTaaS)

PTaaS stands for Penetration Testing as a Service. It is a subscription-based continuous penetration testing model that delivers ongoing security testing throughout the software development lifecycle, rather than a single annual engagement. PTaaS combines automated scanning with manual testing by certified security engineers, providing real-time vulnerability findings, unlimited retesting, and a live reporting portal. It replaces the traditional annual pen test report with continuous assurance, giving your team a current picture of security posture at all times rather than a point-in-time snapshot that is out of date the moment it is published.

Automated penetration testing tools run programmatic scans to identify known vulnerability patterns: missing security headers, outdated TLS configurations, known CVE matches in dependencies, and OWASP Top 10 pattern matches. PTaaS includes this automated layer but adds human-led testing that automated tools cannot replicate. CREST-certified engineers identify business logic bypass (price manipulation, workflow skipping), chained exploitation across multiple systems, broken access control across user roles, authentication edge cases, session management flaws, and context-specific attack paths that scanners cannot model. At Precursor Security, our PTaaS programme uses automated scanning for coverage breadth, with CREST-certified engineers validating every finding, removing false positives, and manually probing complex application logic. The human layer is not optional. It is where the critical vulnerabilities are found.

PTaaS pricing typically ranges from £2,500 to £10,000 or more per month depending on scope and testing frequency. Small applications (single web app, monthly testing) average £2,500 to £4,000+ per month including automated scanning, manual validation, and unlimited retesting. Mid-sized programmes (multiple applications, weekly testing) typically cost £5,000 to £7,500+ per month. Enterprise PTaaS (five or more applications, continuous testing, dedicated tester allocation) typically costs £8,000 to £10,000 or more per month. Annual contracts offer 15 to 20 percent savings versus monthly billing. Pricing includes platform access, manual testing hours, false positive validation, and compliance reporting. We provide fixed monthly quotes after understanding your application portfolio.

Annual pentests leave 364-day gaps where new vulnerabilities accumulate undetected. Modern development ships code weekly or daily, so annual testing only validates a snapshot. New CVEs emerge constantly, and continuous testing catches newly exploitable vulnerabilities in your dependencies. Developer fixes introduce new bugs, and annual testing cannot verify that patches do not create new issues. Compliance requirements are increasingly moving toward continuous assurance rather than point-in-time reports. Attack surfaces expand through cloud provisioning, API changes, and new integrations between annual tests. The cost per vulnerability found is lower with PTaaS due to testing volume and early detection. Continuous testing does not replace annual penetration tests but augments them with ongoing assurance between major assessments.

No. PTaaS includes manual testing by CREST-certified engineers, delivered continuously rather than as a one-off project. Automated tools catch pattern-matched vulnerabilities: missing security headers, outdated TLS configurations, known CVE matches, and OWASP Top 10 signature matches. They cannot identify business logic flaws, because those require understanding how the application is supposed to work and testing the ways in which that logic can be abused. Our human testers probe broken access control across different user roles, business logic bypass (for example, price manipulation or workflow skipping), chained exploitation where two low-severity findings combine to become critical, authentication edge cases, and session management flaws that scanners cannot model. Every automated finding is manually validated by a CREST-certified engineer before it appears in your portal, so the findings you receive are real, exploitable, and prioritised by true business impact, not CVSS score alone.

Continuous testing supports several major compliance frameworks. DORA (Digital Operational Resilience Act) requires ongoing ICT security testing for financial services firms. ISO 27001:2022 Annex A includes continuous monitoring and testing controls. SOC 2 Type II requires ongoing security testing evidence across the full audit period, not a single snapshot. FCA operational resilience expectations require evidence of continuous assurance for regulated firms. PCI DSS v4.0 includes continuous penetration testing requirements for cardholder data environments. We generate point-in-time executive summary reports at any interval for auditor submission, alongside the continuous findings record available in your portal at all times.

It is an annual subscription, so the total annual cost is higher than a single engagement. However, the cost per vulnerability found is significantly lower due to the volume of testing and retesting included. Continuous testing also catches vulnerabilities earlier in the development cycle, where they cost considerably less to fix. The business case is strongest when your team ships code weekly or more frequently, when you have compliance requirements for ongoing assurance, or when you are managing a growing application portfolio.