SAP HCI is intended as Integration System-as-a-Provider (PAAS) which helps to integrate a number of unbiased methods/apps for a company process. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI delivers Adapters (Connectivity solutions) including: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. A lot