We see a lot of SMBs using Dropbox and have rarely encountered Box out in the wild. In both cases, they are often converting over to OneDrive - the Office Suite is still a very, very strong play in that most companies need/prefer it to alternatives, and since OneDrive is bundled the question inevitably gets asked, "why am I paying for DropBox if I have OneDrive/SharePoint included in this cost over here?". No good answer, really. I mean there are things that DropBox does better, but for a lot of businesses those strengths aren't valuable enough to pay the premium.