Calendly offers Free Trial, but ClickBook does not.
ClickBook 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 ClickBook Starts at $19.95/Month whereas for Calendly Starts at $8/User/Month when Billed Yearly.
Some top alternatives to ClickBook includes Appointy, Calendly, Cogsworth, Book Like A Boss, Scheduly, InScheduler, Online Appointment Scheduler, Appointmind, Web-appointments, i-Scheduling for Appointments, CalendarSpots.com, CatchApp Bookings and Zoho Booking.
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.