SAP HCI is designed as Integration System-as-a-Services (PAAS) which helps to combine multiple unbiased units/purposes for a company course of action. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI offers Adapters (Connectivity choices) like: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://angelocytme.blog-eye.com/28330294/hana-cloud-integration