SAP HCI is made as Integration Platform-as-a-Services (PAAS) which helps to combine various unbiased units/apps for a business approach. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI features Adapters (Connectivity selections) for example: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. A few https://s4-hana-cloud-architectur14703.therainblog.com/27676501/hana-cloud-integration