Yes, both Zendesk Support and Replicon PSA offer a Free Trial.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Replicon PSA is designed for Large Enterprises, Small Business and Medium Business.
Pricing for Zendesk Support Starts at $19/user/month when yearly whereas for Replicon PSA Starts at $6.00per month when Billed Yearly.
Some top alternatives to Zendesk Support includes Zoho Desk, Tidio Helpdesk, Deskero, Support Hub, HelpDesk, Desky, Help Scout, Salesforce Service Cloud, ReadyDesk, Sitehelpdesk, HESK and BoldDesk.
Some top alternatives to Replicon PSA includes and undefined.