SAP HCI is designed as Integration System-as-a-Support (PAAS) which helps you to integrate numerous independent systems/applications for a company course of action. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid design. HCI gives Adapters (Connectivity alternatives) including: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://sap-s-4hana-cloud79135.suomiblog.com/hana-cloud-integration-43843417