Yes, both Helpy and Zendesk Support offer a Free Trial.
Helpy is designed for Large Enterprises, Medium Business and Small Business.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Helpy Starts at $15/User/Month whereas for Zendesk Support Starts at $19/user/month when yearly.
Some top alternatives to Helpy includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, Freshdesk, ProProfs Help Desk, HelpDesk, Jitbit Helpdesk, Helprace, ReadyDesk, LabiDesk, HESK, Sirportly, Help Desk Premier, Support.cc by 500apps and BoldDesk.
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.