Billing itself as a brand protection program, KnowEm allows users to check the availability status of a username across various social networks. KnowEm currently searches over 340 different social network sites in 15 different categories including blog platforms, photo sharing networks, bookmarking services, and travel sites to name a few. For a fee, KnowEm will enroll you with your chosen username at these 300+ sites so you can “Grab your name before someone else does.” This article from the Washington post provides some insight as to why companies (or even individuals) might want to use this service.
However, KnowEm has one great feature that investigators can take advantage of for free. Anyone can search for a username and check the availability status of that username across all the sites monitored by KnowEm – completely free and without the need to setup an account. If you have a known username for the subject of your investigation, in less than 30 seconds you can see if that username is in use at any of those 300+ sites. A great tool to quickly narrow your research. Go here to try it out.