SharePoint supports intranet, extranet, and Internet applications from a single, integrated platform. The specific licenses depend on three factors: what capabilities are used, how SharePoint is deployed, and where the system is hosted. The terms and conditions for how you can use the software are defined in the Product Terms document.

1. SharePoint Online is licensed on a per-user basis. It can be purchased Online as a standalone plan or included as part of Office 365 plans. Licensing details are available here.
2. On-Premises: For On Premises, intranet sites are licensed using a Server/CAL (Client Access License) model. SharePoint Server 2016 is required for each running instance of the software, and CALs are required for each person or device accessing a SharePoint Server.
   1. SharePoint Standard CAL: the Standard CAL delivers the core capabilities of SharePoint
      • Sites: a single infrastructure for all your business websites
      • Communities: an integrated collaboration platform
      • Content: enterprise content management (ECM) for the masses
      • Search: people and expertise search, visual previews, visual best bets
   2. SharePoint Enterprise CAL: the Enterprise CAL delivers the full capabilities of SharePoint
      • Sites: a single infrastructure for all your business websites
      • Communities: an integrated collaboration platform
      • Content: ECM for the masses
      • Search: standard search features plus entity extraction, video search, item recommendations
      • Business solutions (includes Access Services and InfoPath Services)
      • Business Intelligence for everyone (includes Power View, PerformancePoint Services, Excel Services, and Visio Services)