Enterprises must rethink traditional security models in the era of relentless cyber threats and rapidly evolving regulatory landscapes. Perimeter-based defenses, once sufficient, have become obsolete as attackers exploit every conceivable avenue, supply chains, compromised credentials, cloud misconfigurations, and insider threats. Enter Zero Trust: a security philosophy and architecture that assumes breach and enforces least-privilege access everywhere, for everyone. As the world's leading hyperscalers, Microsoft Azure and Amazon Web Services (AWS) have responded with robust, evolving toolkits and frameworks for building Zero Trust environments.