Yes, both OpusTime and Calendly offer a Free Trial.
OpusTime is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Calendly is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for OpusTime Starts at $35/Month when Billed Yearly whereas for Calendly Starts at $8/User/Month when Billed Yearly.
Some top alternatives to OpusTime includes Appointy, Setmore, Calendly, Cogsworth, Book Like A Boss, Scheduly, SnapAppointments, Online Appointment Scheduler, ClickBook, Appointmind, Web-appointments, i-Scheduling for Appointments 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.