SAP HCI is intended 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://s4hanacloudfaq35702.frewwebs.com/28711235/hana-cloud-integration