Cadence is a stateful programming system that simplifies building scalable, distributed applications and workflows. It provides a programing model that transparently handles the complexity of saving and reconstituting application state across long-running workflows and system-level failures. By doing so, Cadence allows developers to write stateful applications without the need to address complex process-failure handling. Cadence can scale horizontally to handle millions of concurrent workflows, and delivers high reliability through asynchronous history event replication to provide resilience against even region-level failures. This whitepaper details Instaclustr Managed Cadence, the first fully managed Cadence offering on the market that brings a proven capability for operating distributed technologies at the highest levels of scale and reliability.