SAP HCI is designed as Integration System-as-a-Assistance (PAAS) which really helps to combine a number of impartial techniques/programs for a business process. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI delivers Adapters (Connectivity possibilities) including: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4-hana-cloud-onboarding69146.activosblog.com/27726985/hana-cloud-integration