SAP HCI is created as Integration Platform-as-a-Services (PAAS) which helps to integrate various impartial systems/apps for a company course of action. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI delivers Adapters (Connectivity alternatives) which include: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, https://s4-hana-cloud-edition59913.blazingblog.com/28286315/hana-cloud-integration