SAP HCI is made as Integration System-as-a-Assistance (PAAS) which helps you to combine several unbiased methods/programs for a company process. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI presents Adapters (Connectivity choices) for example: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://keeganavpib.bloggazza.com/27736634/hana-cloud-integration