Yes, both GLPI and osTicket offer a Free Trial.
GLPI 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 GLPI are unavailable.
Some top alternatives to GLPI includes Freshservice, ManageEngine ServiceDesk Plus, SolarWinds Service Desk, Jira Service Desk, Symantec ServiceDesk, IBM Control Desk, osTicket, TOPdesk, Spiceworks Help Desk, iSupport Software, Richdesk and Scopedesk.
Some top alternatives to osTicket includes Zoho Desk, Zendesk Support, ManageEngine ServiceDesk Plus, Freshservice, Jira Service Desk, Freshdesk, HelpDesk, SysAid, UVdesk, Jitbit Helpdesk, eStreamDesk, ReadyDesk, Spiceworks Help Desk, HESK, BoldDesk and GLPI.