Recently a coworker recommended when I was looking for a webcounter service that tracks many webpages via only one account. does just this. You open one account and inside this account you can add as many projects (aka websites) as you like. You get a new counter code and a new statistics view for every website. Meanwhile I’ve installed statcounter on several websites and I don’t miss anything in the stats: from search engines, keywords to top pages it contains everything you might want to compare.

If you want to try it out, you might want to take a look at the demo stats.

(Btw: The service is free and I don’t get money for this ad ;-)