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Yes, both Zendesk Support and TrackingTime offer a Free Trial.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
TrackingTime is designed for Freelancers, Medium Business and Small Business.
Pricing for Zendesk Support Starts at $19/user/month when yearly whereas for TrackingTime Starts at $4.16/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 TrackingTime includes Timely, TimeTracker App, Toggl Track, Hubstaff, Clockify, Tick, TimeTrack, Timebase, Timesheet and Tack.