Dropbox is talking with banks about a possible 2H IPO, sources tell Quartz. In 2011, the cloud storage provider raised $250M at a reported ~$4B valuation. The report comes shortly after Dropbox, which depends heavily on consumers and SMBs, introduced new IT admin tools meant to increase its enterprise appeal and thus help it take on another hot startup, Box. Box obtained funding last year at a $1.2B valuation, and is targeting a 2014 IPO. An offering for either could provide a lift to cloud backup services provider Carbonite (CARB).