Yes, both Happy Tools and Calendly offer a Free Trial.
Happy Tools is designed for Medium Business and Small Business.
Calendly is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Happy Tools Starts at $5/User/Month whereas for Calendly Starts at $8/User/Month when Billed Yearly.
Some top alternatives to Happy Tools includes Appointy, Calendly, Cogsworth, Book Like A Boss, Scheduly, Hupport, Office Tracker, TrackSmart Scheduling, My Work Scheduler, DaySchedule, Booking Social, Web-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.