SAP HCI is made as Integration Platform-as-a-Assistance (PAAS) which really helps to combine various unbiased units/purposes for a company course of action. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI provides Adapters (Connectivity alternatives) including: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4-hana-cloud-trial16059.bloginder.com/28735460/hana-cloud-integration