Yes, both Zendesk Support and Reftab offer a Free Trial.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Reftab is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Zendesk Support Starts at $19/user/month when yearly whereas for Reftab Starts at $31.25/month when yearly.
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.
Some top alternatives to Reftab includes Atera, SuperOps RMM and NinjaOne (NinjaRMM).