Cache as a Service (CaaS) is a new computing buzzword. CaaS is used to share data between applications and it builds a common data access layer across an organization. In the healthcare domain, Charges & Services, Claims, Scheduling, Reporting, and Patient Management are some of the important modules. Organizations can develop them in any programming language the team is comfortable with, in a Microservice fashion. The applications can still share data using Apache Ignite's in-memory data grid. There is no need to create a local caching infrastructure for each application: