• Both are a collaborative application with lots of features.
• Both are very present in the enterprise

• Sharepoint is a commercial product, while Tiki is a community-managed open source project. License: LGPL.
• Tiki is a LAMP application whereas SharePoint is is designed to run on a Windows Server.
• Tiki comes from the web app/wiki world (where everything is browser-based) where as SharePoint comes from the Document Management System (DMS) world where things are based on files/desktop-apps.
• Tiki has features that go beyond the scope of SharePoint (ex.: because they are covered by Microsoft Outlook)

Tiki Trackers <-> SharePoint Lists
Tiki File Gallery and Tiki WebDAV are similar to SharePoint file management (does this feature have a name?)

Even references that don't directly discuss Tiki may have comparisons are relevant to Tiki.

• How good is MS Sharepoint as a wiki? wikisym.org
• Sharepoint vs Twiki. twiki.org.
• Comparing Sharepoint to Confluence?. Atlassian blog. 2009-03-06.
• MS Sharepoint as a Wiki: Few functions, less compatibility. Seibert Media blog. 2009-02-27.

• SharePoint
• TikiWiki vs SharePoint