Yes, both UVdesk and Zendesk Support offer a Free Trial.
UVdesk is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Pricing for UVdesk Starts at $16/Month when Billed Yearly whereas for Zendesk Support Starts at $19/user/month when yearly.
Some top alternatives to UVdesk includes Zoho Desk, Zendesk Support, ManageEngine ServiceDesk Plus, Freshdesk, Deskero, HelpDesk, osTicket, Desky, EngageBay Helpdesk System, ReadyDesk, Sitehelpdesk, Support.cc by 500apps, EpicPxls and BoldDesk.
Some top alternatives to Zendesk Support includes Zoho Desk, ManageEngine ServiceDesk Plus, Deskero, Support Hub, HelpDesk, Desky, Help Scout, Salesforce Service Cloud, ReadyDesk, Sitehelpdesk, HESK and BoldDesk.