SharePoint 2013 refines the platform by strengthening social, search, mobile, web applications and much more. When upgrading, make sure you utilize the best SharePoint solution for your business needs. This helpful chart identifies and compares the features that are available in SharePoint 2013 Foundation and SharePoint 2013 Server editions.
Download link:
https://www.microsoft.com/en-us/download/details.aspx?id=35488
Feature Compare link:
http://www.fpweb.net/sharepoint-2013/compare-sharepoint-foundation-server/