Yes, both Calendly and Online Appointment Scheduler offer a Free Trial.
Calendly is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Online Appointment Scheduler is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Calendly Starts at $8/User/Month when Billed Yearly whereas for Online Appointment Scheduler Starts at $5/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 Online Appointment Scheduler includes Appointy, Acuity Scheduling, Setmore, Calendly, Cogsworth, Book Like A Boss, SnapAppointments, checkAppointments, ClickBook, hitAppoint, Appointmind, Web-appointments and i-Scheduling for Appointments.