SAP HCI is intended as Integration System-as-a-Services (PAAS) which really helps to integrate many independent devices/apps for a company course of action. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI gives Adapters (Connectivity alternatives) like: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oDat