Dropbox has been highly successful so far, at least in terms of getting people to sign up and use the site. How well it's doing financially is less known.
But it must be doing at least OK, since it's now considering an IPO, possibly as early as this year.
Dropbox is already valued at $4 billion, €3 billion, in its last funding round, and may be looking to raise money in a public offering at a higher valuation than that.
Dropbox is making some bigger inroads into the enterprise market, the service is already used widely by small and medium businesses, but Dropbox is adding new features that would make the tool easier to manage in an enterprise environment.