SharePoint is a web application platform in the Microsoft Office server suite. Launched in 2001, SharePoint combines various functions which are traditionally separate applications: intranet, extranet, content management, document management, personal cloud, enterprise social networking, enterprise search, business intelligence, workflow management, web content management, and an enterprise application store. SharePoint servers have traditionally been deployed for internal use in mid-size businesses and large departments alongside Microsoft Exchange, Skype for Business, and Office Web Apps; but Microsoft’s ‘Office 365’ software as a service offering (which includes a version of SharePoint) has led to increased usage of SharePoint in smaller organizations.
While Office 365 provides SharePoint as a service, installing SharePoint on premises typically requires multiple virtual machines, at least two separate physical servers, and is a somewhat significant installation and configuration effort. The software is based on an n-tier service oriented architecture. Enterprise application software (for example, email servers, ERP, BI and CRM products) often either requires or integrates with elements of SharePoint. As an application platform, SharePoint provides central management, governance, and security controls. The SharePoint platform manages Internet Information Services (IIS) via form-based management tooling.
Since the release of SharePoint 2013, Microsoft’s primary channel for distribution of SharePoint has been Office 365, where the product is continuously being upgraded. New versions are released every few years, and represent a supported snapshot of the cloud software. Microsoft currently has three tiers of pricing for SharePoint 2013, including a free version (whose future is currently uncertain). SharePoint 2013 is also resold through a cloud model by many third-party vendors. The next on-premises release is SharePoint 2016, expected to have increased hybrid cloud integration.