SAP HCI is built as Integration System-as-a-Company (PAAS) which really helps to combine various unbiased devices/apps for a company course of action. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI provides Adapters (Connectivity choices) like: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, https://s4-hana-cloud-business-pa58024.azzablog.com/28273988/hana-cloud-integration