The system behind a successful SaaS agency operates through three key components. First, Marketing and Sales drive customer acquisition by promoting the platform and converting leads into clients. Second, the Software serves as the core product, offering scalable solutions that meet client needs. Finally, Onboarding and Customer Service ensure a smooth client experience by helping customers get started with the software and providing ongoing support to maximize their success and satisfaction. Together, these parts create a seamless process that grows the business while delivering exceptional value to clients.