SAP HCI is made as Integration System-as-a-Services (PAAS) which helps you to integrate many unbiased units/purposes for a company process. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI delivers Adapters (Connectivity solutions) such as: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4-hana-cloud-business-pa57035.blogdanica.com/28070663/hana-cloud-integration