SAP HCI is intended as Integration System-as-a-Assistance (PAAS) which helps you to integrate numerous unbiased devices/apps for a business method. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI features Adapters (Connectivity selections) for example: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData.