Yes, both ReplyManager and eStreamDesk offer a Free Trial.
ReplyManager is designed for Large Enterprises, Medium Business and Small Business.
eStreamDesk is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for ReplyManager Starts at $39/Month when Billed Yearly whereas for eStreamDesk Starts at $29/Month.
Some top alternatives to ReplyManager includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, Freshdesk, Teamwork Desk, LiveAgent, HelpDesk, SysAid, Jitbit Helpdesk, eStreamDesk, EngageBay Helpdesk System, EvantoDesk, HelpdeskEddy, LabiDesk and BoldDesk.
Some top alternatives to eStreamDesk includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, Freshdesk, Deskero, Teamwork Desk, LiveAgent, HelpDesk, SysAid, Jitbit Helpdesk, Rhino Support, ReadyDesk, HelpdeskEddy, Sitehelpdesk and HESK.