MOSS (Microsoft Office SharePoint Server) is the earlier version of Microsoft SharePoint Server. MOSS last appeared in the 2007 version. Since then Microsoft SharePoint Server 2010 and 2013 have improved on MOSS. MOSS and its successors have two options in Editions - Standard and Enterprise. These are built on top of Windows SharePoint Services in MOSS, and on SharePoint Foundation in 2010 and 2013. Windows SharePoint Services and SharePoint Foundation are free downloads and some hosting providers such as https://cloudappsportal.com
offer free hosted SharePoint Foundation. As of 2015, companies continue to use all three versions, and hosting providers also provide these versions.