Yes, both ProProfs Help Desk and LiveAgent offer a Free Trial.
ProProfs Help Desk is designed for Large Enterprises, Medium Business and Small Business.
LiveAgent is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for ProProfs Help Desk Starts at $10/User/Month when Billed Yearly whereas for LiveAgent Starts at $15/User/Month.
Some top alternatives to ProProfs Help Desk includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, ManageEngine ServiceDesk Plus, Freshdesk, Teamwork Desk, LiveAgent, Support Hub, HelpDesk, SysAid, Jitbit Helpdesk, ReadyDesk, Sitehelpdesk, Help Desk Premier, DeskXpand and BoldDesk.
Some top alternatives to LiveAgent includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, ManageEngine ServiceDesk Plus, Freshdesk, ClickDesk, HelpDesk, SysAid, Jitbit Helpdesk, Desky, Help Scout, LabiDesk, LiveChat, Zendesk Chat, LiveHelpNow and Little SaaS Communication.