Yes, both Zendesk Support and Chisel offer a Free Trial.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Chisel is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Zendesk Support Starts at $19/user/month when yearly whereas for Chisel Starts at $49/maker/month.
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.
Some top alternatives to Chisel includes and undefined.