SAP HCI is made as Integration Platform-as-a-Company (PAAS) which really helps to combine various unbiased systems/applications for a business procedure. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI features Adapters (Connectivity options) such as: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4-hana-cloud-tutorial25791.dreamyblogs.com/28516439/hana-cloud-integration