SAP S/4HANA is available in both cloud and on-premise deployments. The cloud deployment is a fully managed cloud ERP system that provides businesses with the latest technologies and innovations from SAP without having to manage the system themselves. The on-premise deployment involves deploying the system on the business's own servers, providing businesses with more control over the system and allowing for greater customization. SAP S/4HANA as a Service (SaaS) is a deployment option that combines the benefits of both cloud and on-premise deployments.