SAP HCI is developed as Integration Platform-as-a-Support (PAAS) which really helps to combine a number of impartial techniques/applications for a business process. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI delivers Adapters (Connectivity selections) such as: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, https://sap-s-4hana-cloud79235.ampedpages.com/hana-cloud-integration-55610301