SAP HCI is built as Integration System-as-a-Support (PAAS) which helps you to combine various independent techniques/apps for a company system. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI offers Adapters (Connectivity possibilities) which include: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4hanacloudtrial16037.kylieblog.com/28622598/hana-cloud-integration