When comparing Tiki vs MediaWiki, the Slant community recommends MediaWiki for most people. In the question“What are the best multi-user wikis?” MediaWiki is ranked 2nd while Tiki is ranked 18th. The most important reason people chose MediaWiki is:
Mediawiki is a widely used wiki engine. It is used to power Wikipedia and thus most people will be more comfortable/accustomed to using MediaWiki.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro It's a full featured CMS
Tiki supports user-account management, permission management, allows managing menus, customizing layout, etc.
Pro Bitnami stack
Bitnami stack available for Cloud or install as Virtual machine.
Pro Lots of built-in features
Tiki includes tracker, chat, newsletter, forum and much, much more functionality out of the box.
Pro Free and open source
Tiki is licensed under LGPL.
Pro LDAP support
Pro Upgrades are smooth
Because all features of Tiki are supported by core developers, compared to a model where the wiki relies on third-party extensions that may or may not get upgraded along with the core codebase, the upgrades are a lot easier.
Pro The de facto standard
Mediawiki is a widely used wiki engine. It is used to power Wikipedia and thus most people will be more comfortable/accustomed to using MediaWiki.
Pro It has a powerful templating system
Pro Free and open source
Licensed under GPL.
Pro Version control
MediaWiki allows viewing past revisions of pages.
Pro It has a usable WYSIWYG editor
Pro Thanks to Wikipedia it is thoroughly documented
Pro Runs on any PHP server
It requires a webserver running PHP 5.2 or later of any kind.
Pro Great multilingual support
MediaWiki has full support for over 65 languages and partial support for over 300.
Pro Multiple database support
MediaWiki can store data in MySQL, PostgreSQL, Oracle and SQLite databases.
Cons
Con Can feel bloated
Since there's so much stuff in Tiki already built-in, it can be overwhelming if all you need is a simple wiki.
Con Access control requires an extension
There is no built-in access control, but you can download an extension for ACL.