SAP HCI is designed as Integration Platform-as-a-Assistance (PAAS) which helps to integrate a number of unbiased systems/programs for a business course of action. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI provides Adapters (Connectivity possibilities) which include: Cleaning soap Adapter, IDoc, HTTP, https://s4-hana-cloud-landscape-c70369.nizarblog.com/28299278/hana-cloud-integration