Yes, both TaskOnBot and Yazira offer a Free Trial.
TaskOnBot is designed for Individuals, Freelancers, Medium Business and Small Business.
Yazira is designed for Large Enterprises, Medium Business and Small Business.
Pricing for TaskOnBot Starts at $15/Month when Billed Yearly whereas for Yazira Starts at $9/User/Month.
Some top alternatives to TaskOnBot includes Todoist, Wrike, Smartsheet, Microsoft To Do, Ayoa, Remember The Milk, TickTick, Any.do, OmniFocus, GQueues, MeisterTask, Easynote and ClickUp.
Some top alternatives to Yazira includes Todoist, Wrike, Smartsheet, TeamGantt, Teamwork, ProjectManager.com, nTask, RationalPlan, Today, Teamly, ClickUp, Height and Canvasrs.