SAP HCI is created as Integration Platform-as-a-Assistance (PAAS) which really helps to combine multiple unbiased systems/applications for a company system. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI delivers Adapters (Connectivity solutions) which include: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4-hana-cloud-business-pa83782.targetblogs.com/28678886/hana-cloud-integration