DropBox vs iCloud

Dropbox is a Web-based file hosting service that uses cloud computing to enable users to store and share files and folders with others across the Internet using file synchronization. There are both free and paid services, each with varying options. In comparison to similar services, Dropbox offers a relatively large number of user clients across a variety of desktop and mobile operating systems. DropBox alternatives for enterprise are: Box, Microsoft SharePoint, Office 365.
iCloud is cloud service done right. It stores your music, photos, apps, calendars, documents, and more. And wirelessly pushes them to all your devices.