SAP HCI is designed as Integration Platform-as-a-Assistance (PAAS) which really helps to combine many impartial programs/apps for a business method. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid product. HCI presents Adapters (Connectivity selections) which include: Cleaning soap Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. http://rowanekmos.post-blogs.com/19698181/hybris-c4c-hybris-c4c-tutorial-hybris-c4c-training