SAP HCI is created as Integration Platform-as-a-Assistance (PAAS) which really helps to combine multiple independent methods/applications for a business procedure. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI offers Adapters (Connectivity choices) including: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. A few https://s4hanacloudsapnotes92514.blogoscience.com/34310388/hana-cloud-integration