SAP HCI is intended as Integration Platform-as-a-Service (PAAS) which really helps to integrate many independent devices/applications for a business process. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI features Adapters (Connectivity possibilities) like: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. A lot https://emiliouogyr.bloggerchest.com/28143778/hana-cloud-integration