SAP HCI is created as Integration Platform-as-a-Provider (PAAS) which really helps to combine many impartial devices/apps for a business 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://sapanalyticsclouds4hana91468.blogrelation.com/34149242/hana-cloud-integration