Yes, both Set a Time and Calendly offer a Free Trial.
Set a Time is designed for Large Enterprises, Medium Business and Small Business.
Calendly is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Set a Time Starts at $5/User/Month when Billed Yearly whereas for Calendly Starts at $8/User/Month when Billed Yearly.
Some top alternatives to Set a Time includes Appointy, Calendly, Square Appointments, Cogsworth, OpusTime, Book Like A Boss, Scheduly, Hupport, SnapAppointments, Online Appointment Scheduler, hitAppoint, i-Scheduling for Appointments and CatchApp Bookings.
Some top alternatives to Calendly includes Appointy, Acuity Scheduling, Setmore, Microsoft Bookings, Cogsworth, Book Like A Boss, Doodle, Tidycal, Cal.com, DaySchedule, Google Calendar, Calendar and Zoho Booking.