(Google results from 20 Feb 2007) To every term we added "wiki", e.g. "MediaWiki wiki", "MoinMoin wiki" in an effort to exclude ambiguity. We searched in Google without quotes. Searches were conducted in Germany using an English interface. Note that Incentive, Perspective and SamePage were not included due to the commonality of their names to English words giving unreasonable results.

(Google and Alexa results from 14 Aug 2006) To every therm we added "wiki", eg. "MediaWiki wiki", "MoinMoin wiki" in an effort to exclude abiguous terms.

#	Wiki Engine	Google Res	Alexa Rank	License	Link
1	MediaWiki	295000000	9091	GPL2	markup
2	Twiki	4680000	22998	GPL
3	TikiWiki	4130000	21130	LGPL
4	PukiWiki	2510000	4850280	GPL2
5	MoinMoin	2120000	58494	GPL
6	PmWiki	1260000	31888	GPL
7	DokuWiki	969000	556859	GPL2
8	PhpWiki	913000	1398912	GPL
9	MoniWiki*	861000	0	GPL
10	TiddlyWiki	831000	92717	BSD
11	JSPWiki	703000	92813	LGPL
12	SnipSnap	580000	128718	GPL
13	WackoWiki	369000	172554	BSD
14	Xwiki	343000	184037	LGPL
15	UseMod	282000	87300	GPL
16	Midgard Wiki*	230000	89949	LGPL
17	FlexWiki	220000	167955	CPL
18	Instiki	216000	140083	GPL
19	Zwiki	209000	174086	GPL
20	TracWiki*	206000	87279	Mod. BSD

• Engine does not have its own domain name, so Alexa rank for this wiki is misleading.

Commercial Wiki Engine Popularity