Yes, both eStreamDesk and Zendesk Support offer a Free Trial.
eStreamDesk is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Pricing for eStreamDesk Starts at $29/Month whereas for Zendesk Support Starts at $19/user/month when yearly.
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.
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.