SAP HCI is built as Integration System-as-a-Services (PAAS) which helps you to combine numerous impartial systems/programs for a company process. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI offers Adapters (Connectivity alternatives) for instance: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData.