The Open Cloud Security Movement emphasizes the necessity of integrating open-source principles into cloud security to address the complexities of securing cloud environments, which are compared to the early days of operating systems like UNIX and Linux. With cloud service providers like AWS, Azure, and GCP offering thousands of actions, the movement advocates for transparency, collaboration, accessibility, and innovation to enhance cloud security. The Open Cloud Security Manifesto outlines the movement's vision for a shared responsibility in cloud security, highlighting the importance of open-source collaboration and tools such as Prowler to provide robust and transparent security solutions. It emphasizes the importance of community engagement, adherence to high standards, and adaptability in an evolving digital landscape, aiming to build a foundation of trust and resilience across enterprises, public organizations, and individual users globally. The movement is not just about developing software but setting a new standard for technology integration into business, fostering a secure and transparent cloud environment.