Yes, both HourStack and TimeTackle offer a Free Trial.
HourStack is designed for Medium Business and Small Business.
TimeTackle is designed for Large Enterprises, Medium Business and Small Business.
Pricing for HourStack Starts at $9/Month when Billed Yearly whereas for TimeTackle Starts at $12/User/Month when Billed Yearly.
Some top alternatives to HourStack includes TimeCamp, TrackingTime, TimeTrack, Busy, Timebase, TeamTime, Sunsama, Tack, Timet and TimeTackle.
Some top alternatives to TimeTackle includes Hubstaff, TrackingTime, Clockify, TimeTrack, Timebase, Time Track Bill, Timesheet, Time Analytics, Billable and Calendar.