SAP HCI is developed as Integration Platform-as-a-Company (PAAS) which really helps to integrate a number of independent systems/purposes for a business procedure. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI delivers Adapters (Connectivity alternatives) such as: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, https://s4-hana-cloud-onboarding70357.ttblogs.com/7678328/hana-cloud-integration