Key components of the Power BI ecosystem comprises:
Power BI Desktop
The Windows-desktop-based application for PCs and desktops.
Power BI (Service)
The SaaS (software as a service) based online service (formerly known as Power BI for Office 365, now referred to as PowerBI.com or simply Power BI).
Power BI Mobile Apps
The Power BI Mobile apps for Android and iOS devices, as well as for Windows phones and tablets.
Power BI Gateways
Gateways used to synchronize external data in and out of Power BI.
Power BI Embedded
Power BI REST API can be used to build dashboards and reports into the custom applications that serves Power BI users, as well as non-Power BI users.
Power BI Report Server
Provides a localized way for storing and managing Power BI reports.
Power BI Visuals Marketplace
A marketplace of custom visuals and R-powered visuals.