Yes, both Zendesk Support and Giosg offer a Free Trial.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Giosg is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of Zendesk Support begins at $19/user/month when yearly, while pricing details for Giosg are unavailable.
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 Giosg includes ZoomInfo Chat, LiveAgent, LiveChat, Crisp, LiveEngage, Bleeper, Zoho SalesIQ, Smartchat, ChatFlow247 and Let's Connect.