SAP HCI is built as Integration System-as-a-Provider (PAAS) which really helps to integrate a number of unbiased systems/programs for a business system. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI gives Adapters (Connectivity selections) such as: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, https://juliusfztmf.blogsvirals.com/27846257/hana-cloud-integration