SAP HCI is built as Integration System-as-a-Company (PAAS) which really helps to combine a number of impartial techniques/applications for a company system. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI gives Adapters (Connectivity alternatives) including: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4hanacloudfaq36803.vblogetin.com/33755256/hana-cloud-integration