Yes, both Zoho Desk and HelpOnClick offer a Free Trial.
Zoho Desk is designed for Large Enterprises, Medium Business and Small Business.
HelpOnClick is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Zoho Desk Starts at $14/User/Month when Billed Yearly whereas for HelpOnClick Starts at $7.20/User/Month when Billed Yearly.
Some top alternatives to Zoho Desk includes Zendesk Support, ManageEngine ServiceDesk Plus, Jira Service Desk, HelpDesk, SysAid, Desky, ReadyDesk, Sitehelpdesk, Trakdesk, HESK and BoldDesk.
Some top alternatives to HelpOnClick includes ZoomInfo Chat, ClickDesk, LiveAgent, LiveChat, Crisp, DeskMoz, MyLiveChat, Zendesk Chat, Provide Support, WebsiteAlive and Smartchat.