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Yes, both HelpDesk and ServicePRO offer a Free Trial.
HelpDesk is designed for Large Enterprises, Medium Business and Small Business.
ServicePRO is designed for Large Enterprises, Medium Business and Small Business.
Pricing for HelpDesk Starts at $29/User/Month when Billed Yearly whereas for ServicePRO Starts at $22/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 ServicePRO includes Freshservice, ManageEngine ServiceDesk Plus, SolarWinds Service Desk, Ivanti Service Manager, Jira Service Desk, Symantec ServiceDesk, Halo Service Desk, Micro Focus Service Manager, HelpDesk, eStreamDesk, Milldesk and Sitehelpdesk.