Yes, both Content Central and Box offer a Free Trial.
Content Central is designed for Large Enterprises, Medium Business and Small Business.
Box is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Content Central Starts at $35/User/Month whereas for Box Starts at $5/User/Month when Billed Yearly.
Some top alternatives to Content Central includes PandaDoc, M-Files, PaperNIC, DocuWare, CDOC, Greenbox, docMgt, EZ Doc Filer, Addmin, docEdge DMS and Docsmore.
Some top alternatives to Box includes CollaborateCloud, Microsoft SharePoint, Dropbox Business, FileCloud, ownCloud, Microsoft OneDrive for Business, Dropbox Professional, Citrix Content Collaboration, Genialcloud Facsys and Box Skills.