SAP HCI is intended as Integration Platform-as-a-Company (PAAS) which helps you to combine a number of independent devices/applications for a company procedure. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI delivers Adapters (Connectivity solutions) including: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. https://simonnlieb.win-blog.com/8015139/hana-cloud-integration