Yes, both NetHelpDesk and osTicket offer a Free Trial.
NetHelpDesk is designed for Large Enterprises, Medium Business and Small Business.
osTicket is designed for Individuals, Large Enterprises, Medium Business and Small Business.
The starting price of osTicket begins at $9/User/Month, while pricing details for NetHelpDesk are unavailable.
Some top alternatives to NetHelpDesk includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Kustomer, Freshservice, ManageEngine ServiceDesk Plus, Freshdesk, Kayako, Vision Helpdesk, LiveAgent, TeamSupport, Reamaze, SysAid, osTicket, Jitbit Helpdesk, Help Scout and Gorgias.
Some top alternatives to osTicket includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, Jira Service Desk, Freshdesk, HelpDesk, SysAid, UVdesk, Jitbit Helpdesk, eStreamDesk, ReadyDesk, Spiceworks Help Desk, HESK, BoldDesk and GLPI.