HackerOne Pentest (PTaaS - Penetration Testing as a Service) is a security assessment service that combines a team-driven testing methodology with a platform-based approach. The solution enables real-time visibility into findings during ongoing penetration tests through a SaaS model, allowing organizations to fix and retest vulnerabilities while tests are in progress. It supports testing of web applications, APIs, external networks, internal networks, mobile applications (Android, iOS), AWS cloud infrastructure, and source code analysis. The service leverages vetted, certified ethical hackers to perform security assessments, providing penetration testing for SOC 2, ISO 27001, PCI DSS, HITRUST, FISMA, SOX, GDPR, and other compliance requirements. Engagements typically run for two weeks, following methodology checklists and delivering findings through detailed technical reports. The platform integrates pentest capabilities into vulnerability management and development workflows, enabling organizations to identify security gaps that automated scanners may miss.