I am not surprised that Apple is ahead of everyone. Almost every Apple user is also using iCloud, and most users also use iTunes. This alone should designate Apple as the winner of this contest.
Dropbox gets an honorable second place.
Dropbox, by itself, is growing explosively, as seen in the figure below, and has already exceeded 500 million users:
Dr. Andrei Khurshudov is a Director of Advanced IoT Analytics at Caterpillar. He is managing several teams of data scientists and software developers working on advanced monitoring and analytics solutions for the company’s fleet of connected machines and IoT devices.
With over 20 years of experience as a researcher and an executive leader, Andrei has something to say about the hottest areas in business and technology.
BLACK BOX PARADOX