Yes, both Adobe XD and Box offer a Free Trial.
Adobe XD is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Box is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Adobe XD Starts at $9.99/Month whereas for Box Starts at $5/User/Month when Billed Yearly.
Some top alternatives to Adobe XD includes Figma, FigJam, InVision, UXPin, UX-App, Justinmind, UserX, MockupTiger, Sketch and FlowMapp.
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.