SAP HCI is created as Integration Platform-as-a-Services (PAAS) which helps to integrate numerous independent systems/purposes for a company course of action. HCI can perform 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, oData. https://sap-s-4hana-cloud05948.ambien-blog.com/34327609/hana-cloud-integration