Yes, both Zendesk Support and Knack -No code Platform offer a Free Trial.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Knack -No code Platform is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Zendesk Support Starts at $19/user/month when yearly whereas for Knack -No code Platform Starts at $19/month when monthly.
Some top alternatives to Zendesk Support includes Zoho Desk, ManageEngine ServiceDesk Plus, Deskero, Support Hub, HelpDesk, Desky, Help Scout, Salesforce Service Cloud, ReadyDesk, Sitehelpdesk, HESK and BoldDesk.
Some top alternatives to Knack -No code Platform includes and undefined.