SAP HCI is made as Integration Platform-as-a-Service (PAAS) which helps you to integrate a number of independent programs/purposes for a business system. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI gives Adapters (Connectivity options) for example: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oDat