Yes, both ClickUp and OmniFocus offer a Free Trial.
ClickUp is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
OmniFocus is designed for Large Enterprises, Medium Business and Small Business.
Pricing for ClickUp Starts at $7/User/Month when yearly whereas for OmniFocus Starts at $9.99/Month.
Some top alternatives to ClickUp includes Basecamp, Trello, TeamGantt, Asana, Teamwork, ProjectManager.com, ProWorkflow, nTask, Todoist and Height.
Some top alternatives to OmniFocus includes Todoist, Wrike, Smartsheet, Asana, ProWorkflow, nTask, Taskworld, TickTick, Today, MeisterTask, ClickUp and StickyList.