Yes, both Probooking and Set a Time offer a Free Trial.
Probooking is designed for Large Enterprises, Medium Business and Small Business.
Set a Time is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Probooking Starts at $97Lifetime Access whereas for Set a Time Starts at $5/User/Month when Billed Yearly.
Some top alternatives to Probooking includes Appointy, Set a Time, Cogsworth, OpusTime, Book Like A Boss, EasyCalendar, Office Tracker, My Work Scheduler, ClickBook, DaySchedule, TimeZest, Calendar and Zoho Booking.
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.