SAP HCI is made as Integration Platform-as-a-Support (PAAS) which helps you to integrate several independent techniques/programs for a business procedure. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI features Adapters (Connectivity solutions) which include: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://emilianodavql.ageeksblog.com/27736003/hana-cloud-integration