SAP HCI is built as Integration System-as-a-Support (PAAS) which helps you to integrate a number of impartial programs/apps for a business approach. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI provides Adapters (Connectivity possibilities) for instance: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, https://dominickyzayy.dm-blog.com/28233380/hana-cloud-integration