SAP HCI is created as Integration Platform-as-a-Assistance (PAAS) which really helps to combine multiple unbiased systems/applications for a business procedure. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI offers Adapters (Connectivity choices) like: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. A few https://sap-s-4hana-cloud70246.blogdigy.com/hana-cloud-integration-42200664