SAP HCI is built as Integration Platform-as-a-Company (PAAS) which really helps to combine a number of independent methods/purposes for a company approach. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI offers Adapters (Connectivity solutions) like: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData.