Yes, both UVdesk and Support.cc by 500apps offer a Free Trial.
UVdesk is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Support.cc by 500apps is designed for Large Enterprises, Medium Business and Small Business.
Pricing for UVdesk Starts at $16/Month when Billed Yearly whereas for Support.cc by 500apps Starts at $9.99/Month when Billed Yearly.
Some top alternatives to UVdesk includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshdesk, Deskero, HelpDesk, osTicket, Desky, EngageBay Helpdesk System, ReadyDesk, Sitehelpdesk, Support.cc by 500apps, EpicPxls and BoldDesk.
Some top alternatives to Support.cc by 500apps includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, ManageEngine ServiceDesk Plus, Freshdesk, Deskero, Teamwork Desk, HelpDesk, SysAid, Jitbit Helpdesk, Snappy, CRMdesk, ReadyDesk, LabiDesk, HESK and BoldDesk.