Power BI Free
You can connect to 70+ data sources, publish to web, and exports to Excel. The free version is great for doing your own analysis and won’t need to distribute it to other end users. You have connectivity options such as DirectQuery, live connection and the usage of the gateway.
Power BI Pro
Same features as the Free license with the only differences being: you can share data, reports, and dashboards with other Power BI Pro licensed users, and create App workspaces in which you can’t in Power BI Free. Both Power BI Free and Pro have a 10GB Pro user data storage limit.
Power BI Premium
Power BI Premium is an on-premise deployment and distribution of Power BI reports using the Power BI Report Server. This allows you to maintain reports and move to the cloud when your organization is ready. Address your challenges of large enterprise deployments and workloads.