Both of them are intermediaries that take a search request and plug it into Google. Instead of a dozen adverts on a page, there are two or three, even an intermediary's got to make a buck. Their selling point is that they wipe your searches every 24 hours while overwhelming Google's ad algorithm and cutting down on the crap.

Unfortunately, the search algorithm is taking everybody down the pan because no matter what I'm searching for, I find the first page of entries are for a pop song or a pop music band and there's no way to parse that shit out of the search the way it could be done on old search engines.

(Hey, guys, Dogpile is still out there! )