SAP HCI is built as Integration Platform-as-a-Company (PAAS) which helps you to combine multiple impartial devices/applications for a business 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 options) for example: Cleaning soap Adapter, IDoc, HTTP, Mail, https://s4hanacloudarchitecture03580.dailyblogzz.com/28657377/hana-cloud-integration