Todoist, Microsoft To Do, Workflowy, CherryTree, ClickUp, TickTick, Taiga.io, Zenkit, Dendron, Workday, Quire, Remember The Milk, Zanshin, GoTasks, Projectplace, Simple Outliner, Calendar Notifications Plus, Officevibe, Lattice, ROOT2020.com, Kanbanote, The Big Picture, WP Project Manager, canvasis.live, RPLAN Workstreams, topydo, Outplanr, DoTimely Hub, Everlist, Hubby2do, idealweek, TimeIO, Agilean Solutions, SSuite Year and Day Planner, Keeptab Project Tracker, NoProb To-Do List, Alinof ToDoList, Thymer, MyAsana, Culture Amp, 1List are some alternatives to Nextcloud Tasks.