Yes, both ClickUp and Celoxis offer a Free Trial.
ClickUp is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Celoxis is designed for Large Enterprises, Medium Business and Small Business.
Pricing for ClickUp Starts at $7/User/Month when yearly whereas for Celoxis Starts at $25/month when yearly.
Some top alternatives to ClickUp includes Basecamp, Trello, TeamGantt, Asana, Teamwork, ProjectManager.com, ProWorkflow, nTask, Todoist and Height.
Some top alternatives to Celoxis includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Jira, Basecamp, Microsoft PPM, Wrike, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project, Quick Base, Resource Management by Smartsheet and Height.