Equifax is only one of three nationwide credit reporting agencies, with the others being Experian and TransUnion. Also, the "credit reporting agencies" are only a tiny fraction of all the companies collecting information about you.

I'm not sure if CreditKarma or Borrowell source information from companies other than (or in addition to) Equifax, but if they do then no, they aren't redundant.

That said, there are other strategies to protect yourself, depending on your situation: instead of interacting with more of these companies to better monitor your credit, you could freeze it so that there's less need for monitoring.