Yes, both Trengo and LiveAgent offer a Free Trial.
Trengo is designed for Large Enterprises, Medium Business and Small Business.
LiveAgent is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of LiveAgent begins at $15/User/Month, while pricing details for Trengo are unavailable.
Some top alternatives to Trengo includes Zoho Desk, Zendesk Support, ManageEngine ServiceDesk Plus, Freshservice, Freshdesk, ClickDesk, Front, LiveAgent, HelpDesk, SysAid, Jitbit Helpdesk, Desky, eStreamDesk, Help Scout, UseDesk and LabiDesk.
Some top alternatives to LiveAgent includes Zoho Desk, Zendesk Support, ManageEngine ServiceDesk Plus, Freshservice, Freshdesk, ClickDesk, HelpDesk, SysAid, Jitbit Helpdesk, Desky, Help Scout, LabiDesk, LiveChat, Zendesk Chat, LiveHelpNow and Little SaaS Communication.