Regulatory sandboxes have emerged as pivotal instruments for reconciling technological innovation with legal stability, particularly in sectors characterized by high regulatory density, such as finance, artificial intelligence, and blockchain. This comparative analysis examines the regulatory sandbox frameworks of the United Arab Emirates and Singapore, two jurisdictions that exemplify distinct institutional responses to the challenges of innovation governance and have been methodologically selected due to their shared ambition to position themselves as global hubs for digital transformation, while representing structurally divergent legal systems and regulatory philosophies. The UAE adopts a polycentric and sectoral model rooted in regulatory pluralism, where emirate-specific initiatives operate within a broader federal strategy. This structure enables localized experimentation while aligning with national objectives in digital transformation and geostrategic positioning. Singapore’s unified approach, anchored in the Monetary Authority of Singapore, reflects a model of experimentalist governance characterized by regulatory coherence, iterative learning, and transnational interoperability. Despite their structural peculiarities, decentralized versus centralized, both models converge in their strategic function: enabling adaptive regulation, fostering innovation ecosystems, and safeguarding systemic integrity. The analysis underscores how legal design, institutional configuration, and normative priorities shape the deployment and evolution of regulatory sandboxes as tools of comparative regulatory innovation.