SAP HCI is intended as Integration System-as-a-Services (PAAS) which helps you to combine various unbiased methods/programs for a business course of action. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI features Adapters (Connectivity choices) for example: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, https://riverhfczw.blogoxo.com/28285143/hana-cloud-integration