Yes, both Calendly and GigaBook offer a Free Trial.
Calendly is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
GigaBook is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Calendly Starts at $8/User/Month when Billed Yearly whereas for GigaBook Starts at $12/Month when Billed Yearly.
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.
Some top alternatives to GigaBook includes Appointy, Calendly, Square Appointments, SimplyBook.me, Cogsworth, Book Like A Boss, Scheduly, checkAppointments, GoSchedule, DaySchedule, Booking Social, Web-appointments and Zoho Booking.