SAP HCI is built as Integration System-as-a-Assistance (PAAS) which really helps to combine many impartial programs/apps for a business method. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI features Adapters (Connectivity solutions) which include: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4-hana-cloud-architectur03579.bloginwi.com/61936478/hana-cloud-integration