Azure BI is the Cloud Offering of Microsoft BI. It is an Software as a Service (SAAS) offering. All the upgrades to the underlying technologies of Azure DB, Azure AS, PowerBI etc. will be handled by Microsoft directly so that you are always on the top of technology.
Prosys has created solutions using the Azure BI stack using the following components viz :
Azure DB, which is the Azure Database to create the data staging area
Azure AS, which is the Azure Analysis Services for modelling the data
PowerBI, which connects to Azure AS for visualizing the data.
Additionally you can also create Excel OLAP pivot tables connected to the Azure Analysis Services for the Ad-hoc reporting experience.