Yes, both NimbleWork and ClickUp offer a Free Trial.
NimbleWork is designed for Large Enterprises, Medium Business and Small Business.
ClickUp is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for NimbleWork Starts at $10/user/month whereas for ClickUp Starts at $7/User/Month when yearly.
Some top alternatives to NimbleWork includes Quickbase , Smartsheet, ClickUp and Zoho Projects.
Some top alternatives to ClickUp includes Basecamp, Trello, TeamGantt, Asana, Teamwork, ProjectManager.com, ProWorkflow, nTask, Todoist and Height.