SAP HCI is intended as Integration Platform-as-a-Company (PAAS) which helps you to combine a number of unbiased programs/purposes for a business course of action. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI features Adapters (Connectivity choices) for example: Cleaning soap Adapter, IDoc, https://s4hanacloudfaq82581.angelinsblog.com/27851709/hana-cloud-integration