SAP HCI is designed as Integration Platform-as-a-Assistance (PAAS) which really helps to combine numerous independent techniques/apps for a company course of action. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI presents Adapters (Connectivity options) like: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4hanacloudfaq70246.myparisblog.com/28716238/hana-cloud-integration