Evolution was a darknet market operating on the Tor network. The site was founded by an individual known as 'Verto' who also founded the now defunct Tor Carding Forum. Launched January 14, 2014, it saw rapid growth within its first several months, helped in part by law enforcement seizures of some of its competitors during the six-month-long investigation codenamed Operation Onymous. Speaking about why Evolution was not part of Operation Onymous, the head of the European police cybercrimes division said it was "because there's only so much we can do on one day." Wired estimated that as of November 2014 it was one of the two largest drug markets.