Xwiki is missing.

For me after a similar search it is the current winner. Even though it has it’d downsides.

Pro:

• It is well tested in a enterprise enviromentand mighty

• It has all the features I personally found important for a company wiki, e.g. approval, versioning, templates, collaboration, integration api,etc.

• It is fairly easy to extend it yourself

• It is easy to host subwikis within the same installation with a self defined grade of independence - which is great for customer facing things,large projects with externals,etc.

• The development community is big and enterprise focus and release cycles are good. (Not like a certain .js) There is very little chance it will stall suddenly as the wiki has been adopted by a lot of large companies which seem to support it.

Contra:

• It is written in bloody Java

• (even though this sentence is redundant with the one above) It is a resource hog

• The look and feel is a bit outdated unless you customise it yourself. Then it is reasonably good.But there are basically no paid templates,etc.

• Paid support is only available through third parties it seems.