Yes, both Zendesk Support and LiveHelpNow offer a Free Trial.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
LiveHelpNow is designed for Medium Business and Small Business.
Pricing for Zendesk Support Starts at $19/user/month when yearly whereas for LiveHelpNow Starts at $9/Month.
Some top alternatives to Zendesk Support includes Zoho Desk, Tidio Helpdesk, Deskero, Support Hub, HelpDesk, Desky, Help Scout, Salesforce Service Cloud, ReadyDesk, Sitehelpdesk, HESK and BoldDesk.
Some top alternatives to LiveHelpNow includes ZoomInfo Chat, ClickDesk, Deskero, LiveAgent, HelpDesk, lemtalk, LabiDesk, LiveChat, Crisp, Zendesk Chat and HelpOnClick.