Yes, both Zoho Desk and CloudApp offer a Free Trial.
Zoho Desk is designed for Large Enterprises, Medium Business and Small Business.
CloudApp is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Zoho Desk Starts at $14/User/Month when Billed Yearly whereas for CloudApp Starts at $8/User/Month.
Some top alternatives to Zoho Desk includes Zendesk Support, ManageEngine ServiceDesk Plus, Jira Service Desk, HelpDesk, SysAid, Desky, ReadyDesk, Sitehelpdesk, Trakdesk, HESK and BoldDesk.
Some top alternatives to CloudApp includes Scribe, FireShot, Snapup, RecordScreen.io, Snagit, Droplr, Jumpshare, Screenrec and Snippyly.