Similar

• Both are enterprise content management systems.

Different

• Tiki is community open source while OpenCMS is single-vendor commercial open source. Thus, OpenCMS has an "open core" version and some other versions ("enterprise", etc.)
• OpenCMS is written in Java whereas TikiWiki is written in PHP.
• Tiki hosting requirements are easier (shared hosting)

CMS Match

• http://www.cmsmatch.com/compare/content-management-systems/792+1073

Active contributors

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

Note: There is a problem with http://www.ohloh.net/p/opencms/enlistments

Alias

• OpenCMS
• TikiWiki vs OpenCms