Yes, both Box and Flock offer a Free Trial.
Box is designed for Large Enterprises, Medium Business and Small Business.
Flock is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Box begins at $5/User/Month when Billed Yearly, while pricing details for Flock are unavailable.
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 Flock includes CollaborateCloud, Zoho Connect, Zoho Cliq, ClickUp, Workplace, Zimbra Collaboration, mi.team, Fleekdrive, Chatter, Collabtools and Ideagen Huddle.