Yes, both Calendly and Relay offer a Free Trial.
Calendly is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Relay is designed for Large Enterprises, Small Business, Medium Business and Individuals.
Pricing for Calendly Starts at $8/User/Month when Billed Yearly whereas for Relay Starts at $9/month when yearly.
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 Relay includes and NinjaOne (NinjaRMM).