Yes, both Box and Mixmax offer a Free Trial.
Box is designed for Large Enterprises, Medium Business and Small Business.
Mixmax is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Box Starts at $5/User/Month when Billed Yearly whereas for Mixmax Starts at $9/User/Month when Billed Yearly.
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 Mixmax includes Apollo.io, AroundDeal, CrankWheel, ZoomInfo Engage, EngageBay, Hubspot Marketing Hub, HubSpot CRM, EngageBay Sales CRM, Highspot, Outreach, ImagineSales, Adapt Engage, OutReachly by 500apps and SalesHandy.