Todoist offers Free Trial, but Realsy does not.
Realsy is designed for Individuals, Medium Business and Small Business.
Todoist is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Realsy Starts at $25/Month whereas for Todoist Starts at $4/Month when Billed Yearly.
Some top alternatives to Realsy includes Todoist, Today, Any.do, Easynote, Timo, Atomicly, Qualified, Toodledo, Workvivo, Yourganize and IFTTT.
Some top alternatives to Todoist includes Trello, Wrike, Smartsheet, Teamwork, nTask, Microsoft To Do, Remember The Milk, TickTick, Any.do, MeisterTask, ClickUp and TasksBoard.