DeepField gets its data from agreements it said it has with a number of large network providers. It only measures subscriber traffic, and excludes machine-to-machine communications and things such as "the nearly constant barrage of scanning/intrusion attempts from China," wrote Labovitz.

Companies that access Amazon cloud infrastructure were also ranked. In the top spot was Truste.com, which offers an online privacy seal program that is widely used in commercial sites. Almost 21% of the daily consumer connections to Amazon's cloud go to Truste.

Patrick Thibodeau covers cloud computing and enterprise applications, outsourcing, government IT policies, data centers and IT workforce issues for Computerworld. Follow Patrick on Twitter at or subscribe to . His e-mail address is .

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