Many of the competing cloud storage services are almost strictly consumer-oriented. The services might be used within businesses by individual users, but they lack the administrative tools and management capabilities to be effective on a company-wide scale. IBM just banned the use of Dropbox by employees due to the lack of oversight or ability to control or protect data.
Even so, Box is not without its challengers in the business space. Egnyte stands out--and has even thrown down the gauntlet to directly challenge Box and try to poach its customers. But, with the new features Box makes its service even more appealing to larger businesses.