Thread:Project:Support desk/Is MediaWiki Compatible WIth Other Software?/reply

Which software do you want to be the canonical source for users? That is, do you have SMF users already and want their login to work in MediaWiki? Or do you want your WordPress users to be able to log in?

There are various extensions available to do authentication, but you might have to find someone to write the one you want. You should probably look at the OpenID extension, although that wouldn't provide automatic logins.