SAP HCI is built as Integration System-as-a-Service (PAAS) which really helps to integrate many independent devices/applications for a business approach. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI offers Adapters (Connectivity selections) including: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. A lot https://sap-s-4hana-cloud58024.blogstival.com/50622043/hana-cloud-integration