SAP HCI is designed as Integration System-as-a-Service (PAAS) which really helps to combine various unbiased units/purposes for a company approach. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI offers Adapters (Connectivity options) such as: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://damiengeytm.blogmazing.com/27887604/hana-cloud-integration