Yes, both Box and Plumsail Documents offer a Free Trial.
Box is designed for Large Enterprises, Medium Business and Small Business.
Plumsail Documents is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Box Starts at $5/User/Month when Billed Yearly whereas for Plumsail Documents Starts at $29/Month.
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.
Some top alternatives to Plumsail Documents includes PandaDoc, Docupilot, M-Files, SimplyDocs, Documint, Docmosis, Documate, DocsCloud, Docamatic, Docsmore and Docompile.