Yes, both Setster and Calendly offer a Free Trial.
Setster 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 Setster Starts at $20/Month whereas for Calendly Starts at $8/User/Month when Billed Yearly.
Some top alternatives to Setster includes Appointy, Calendly, Cogsworth, OpusTime, Book Like A Boss, Scheduly, ScheduFlow, SnapAppointments, GoSchedule, hitAppoint, DaySchedule, i-Scheduling for Appointments and Rezrva.
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.