Penetration Testing as a Service (PTaaS) is a modern approach to security testing that blends automated scanning with on-demand access to security experts for continuous, scalable application security. It helps organizations proactively manage vulnerabilities, supplement internal security teams, and address skill gaps—especially as development increasingly incorporates generative AI. By embedding security earlier in the process, PTaaS helps reduce delays later in the software development life cycle (SDLC) caused by late-stage vulnerability discovery.