Yes, both Zendesk Support and Clockify offer a Free Trial.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Clockify is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Zendesk Support Starts at $19/user/month when yearly whereas for Clockify Starts at $3.99/User/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 Clockify includes TimeTracker App, Toggl Track, Harvest, My Hours, Hubstaff, Timesheets.com, TrackingTime, Tick, TimeTrack and TeamTime.