SAP HCI is intended as Integration System-as-a-Services (PAAS) which helps you to combine various unbiased methods/programs for a business course of action. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI features Adapters (Connectivity choices) including: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4hanacloudarchitecture51627.bcbloggers.com/27785126/hana-cloud-integration