SAP HCI is created as Integration Platform-as-a-Assistance (PAAS) which really helps to combine many unbiased devices/apps for a business method. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI features Adapters (Connectivity options) such as: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://s4-hana-cloud-trial17150.xzblogs.com/69616236/hana-cloud-integration