Dropbox 400 Million Users and Growing

Dropbox made itself a household name by giving away cloud storage.
The eight-year-old company, valued at $10 billion, had 300 million registered users a year ago; now it’s got 400 million.

Its two-year-old effort to make money from business users has been less impressive.

While Dropbox led the $904 million global market for business file-sharing last year with about a 24 percent share, No. 2 Box and No. 3 Microsoft each took about 21 percent and doubled their slice of the pie, growing almost twice as fast, according to researcher IDC.

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いつも使っているDropboxですがユーザー数、4億人を突破したみたいですね。すごい。。
他のサービスよりダントツ使いやすいのでわかる気がしますが。
私もユーザーにとって良いサービスが作れるようにがんばろうっと。

Dropbox