Yes, both Calendly and Kustomer offer a Free Trial.
Calendly is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Kustomer is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Calendly Starts at $8/User/Month when Billed Yearly whereas for Kustomer Starts at $29/User/Month.
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 Kustomer includes Zoho Desk, Zendesk Support, ManageEngine ServiceDesk Plus, Zendesk Sell, Freshservice, Freshdesk, HelpDesk, SysAid, Jitbit Helpdesk, Desky, Salesforce Service Cloud, CRMdesk, Gorgias, Trakdesk, AzureDesk and BoldDesk.