Narus is a private company founded in 1997 by Ori Cohen, who had been in charge of technology development for VDONet, an early media streaming pioneer.

It is notable for being the creator of NarusInsight, a supercomputer system which is used by the NSA and other bodies to perform mass surveillance and monitoring of citizens' and corporations' Internet communications in real-time, and whose installation in AT&T's San Francisco Internet backbone gave rise to a 2006 class action lawsuit by the Electronic Frontier Foundation against AT&T. EFF vs AT&T