SAP HCI is built as Integration System-as-a-Company (PAAS) which really helps to combine multiple unbiased units/purposes for a company course of action. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI provides Adapters (Connectivity alternatives) for instance: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, https://s4hanacloudportal59256.ivasdesign.com/50328140/hana-cloud-integration