Zero Trust in SaaS Security is a model that assumes no entity, whether inside or outside the network, can be trusted by default. Access to SaaS applications and data is granted based on strict identity verification, device compliance, and granular access controls tailored to user roles and data sensitivity. Continuous monitoring and real-time threat detection are integral to this approach, ensuring that only authorized and compliant entities can interact with critical SaaS assets. By enforcing the principle of "never trust, always verify," Zero Trust minimizes the risk of unauthorized access and data breaches in SaaS ecosystems.