Until 7 years later when a startup kills both.
(note: i like both companies alot, but this is my gut feeling)
97% of Fortune 500 companies are Box customers. "Usability" is not a primary concern when your customers are building services on top of your platform.
From https://www.dropbox.com/news/company-info: "Dropbox is used in over 4 million businesses with presence in 97 percent of Fortune 500 companies."
The really relevant number is how many of those Fortune 500 companies are fully paid up customers vs a just bunch of people using their free personal account to share files within a project on a ad-hoc basis.
Mind you searching for information on this is nearly impossible as Box co. don't have a trademark to distinguish themselves by.
Me: "Just put them in cloud storage." Her: "Oh you mean ##a## DropBox?"
It has become a common noun instead of a proper noun - at least for the less savvy. That level of entrenchment was one of Facebook's historical defining moments.
Edit: Grr, homegrown textile.
I heard it for the first time with KDX (Haxial) servers, where you had one designated folder into which you could upload files to the server (the others were read-only). But I'm certain that it was used for ftp servers/clients in the same way before
Love it.