Yes, both Calendly and checkAppointments offer a Free Trial.
Calendly is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
checkAppointments is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Calendly Starts at $8/User/Month when Billed Yearly whereas for checkAppointments Starts at $24.95/Month.
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 checkAppointments includes Appointy, Calendly, Cogsworth, Book Like A Boss, Scheduly, SnapAppointments, ClickBook, GoSchedule, hitAppoint, DaySchedule, Appointmind, Web-appointments and CalendarSpots.com.