Yes, both WebGreeter and LiveAgent offer a Free Trial.
WebGreeter is designed for Large Enterprises, Medium Business and Small Business.
LiveAgent is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for WebGreeter Starts at $20/User/Month whereas for LiveAgent Starts at $15/User/Month.
Some top alternatives to WebGreeter includes ZoomInfo Chat, LiveAgent, LiveChat, Crisp, LiveEngage, DeskMoz, Smartchat, LinkedChat, ChatFlow247, Freshchat and Let's Connect.
Some top alternatives to LiveAgent includes Zendesk Support, Tidio Helpdesk, Freshservice, ManageEngine ServiceDesk Plus, Freshdesk, Zoho Desk, ClickDesk, HelpDesk, SysAid, Jitbit Helpdesk, Desky, Help Scout, LabiDesk, LiveChat, Zendesk Chat, LiveHelpNow and Little SaaS Communication.