• Both are enterprise portal software.

• Umbraco is written in ASP.NET whereas Tiki is written in PHP.
• Tiki is community open source while Umbraco is single-vendor commercial open source. Thus, Umbraco has an "open source" version and an "commercial" version.

http://www.cmsmatch.com/compare/content-management-systems/1073+1100

Compare them at http://cmsmatrix.org

Number of contributors who made changes to the project source code each month.

Number of commits made to the project source code each month.

• Umbraco
• TikiWiki vs Umbraco