one very simple idiom question

<p>hi guys is compare against an idiomatic expression?
some people say its not and some say it is and i got confused and i have the sat tmrw.
thanks</p>

<p>It’s correct. So are compare with and compare to</p>

<p>Disagree. You cannot say “compare against.”</p>

<p>I didn’t think so either but I googled it and it appears to be right. “compare with” sounds better though</p>