Yes, both Cal.com and Calendly offer a Free Trial.
Cal.com 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 Cal.com Starts at $12/User/Month when Billed Yearly whereas for Calendly Starts at $8/User/Month when Billed Yearly.
Some top alternatives to Cal.com includes Appointy, Calendly, Cogsworth, Kwikcal, Calendify, Book Like A Boss, EasyCalendar, Calendoo, Dotcal, i-Scheduling for Appointments and Calendar.
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.