Yes, both FreeBusy and BookingKoala offer a Free Trial.
FreeBusy is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
BookingKoala is designed for Large Enterprises, Medium Business and Small Business.
Pricing for FreeBusy Starts at $4/User/Month when Billed Yearly whereas for BookingKoala Starts at $27/Month.
Some top alternatives to FreeBusy includes Appointy, Setmore, Calendly, Cogsworth, Calendify, Book Like A Boss, EasyCalendar, SnapAppointments, hitAppoint, DaySchedule, Appointmind, i-Scheduling for Appointments and Calendar.
Some top alternatives to BookingKoala includes Appointy, Cogsworth, Book Like A Boss, Bookeo, Hupport, SnapAppointments, Online Appointment Scheduler, ClickBook, hitAppoint, FlexBooker, Web-appointments, i-Scheduling for Appointments and Zoho Booking.