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Yes, both HelpDesk and Wowdesk offer a Free Trial.
HelpDesk is designed for Large Enterprises, Medium Business and Small Business.
Wowdesk is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for HelpDesk Starts at $29/User/Month when Billed Yearly whereas for Wowdesk Starts at $6/User/Month.
Some top alternatives to HelpDesk includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, Freshdesk, SupportBee, Teamwork Desk, SysAid, Jitbit Helpdesk, Snappy, Helpspot, ReadyDesk, HelpdeskEddy, Help Desk Premier, Support.cc by 500apps and BoldDesk.
Some top alternatives to Wowdesk includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, Freshdesk, Teamwork Desk, HelpDesk, SysAid, Jitbit Helpdesk, Desky, eStreamDesk, ReadyDesk, UseDesk, Milldesk, AzureDesk and BoldDesk.