JIRA, Trello, monday.com, Redmine, Microsoft Project, Asana, ClickUp, Focalboard, Taiga.io, Bitrix24, ProjectLibre, Smartsheet, Kanboard, IncrediMail, Leantime, Mantis Bug Tracker, Zenkit, TaskFalcon, XavaProjects, zipBoard, Leanlabs.io Kanban, FileOne, Planka, Procezo, Bugzilla, Wrike, AFFiNE, Quire, Oracle Primavera, Codegiant, Opera Mail, winio, Freedcamp, Doddle, SquidHub, ZenTao, Focus Matrix, jtrac, Teamgantt, qdPM, VisionProject, Actions by Moleskine, Productive.io, Taskjuggler, Spekfy, Phabricator, awork, Codecks, FogBugz, ONLYOFFICE Projects, Jira Clone, Freeter, Hiri, Hero Panel, Do It Tomorrow, Timpler, jxProject, Planio, GoodDay, Orangescrum, Agantty, GQueues, Sometime, Foguru, Actionmint, Telerik TeamPulse, Roundrush, SprintGround, Teamhood, Open365, Pocket Lists, Archmule, Grapple, Goalton.com, Tara AI, StrikeBase, June.ai, SkyList, My Renovation, Becky! Internet Mail, Scrum Time, Evadastudio, Assign It To Me, brogress, Easy Redmine, Epicflow, Das HQ, Conveyor, 5pm, Taagly, iManageProject, Planship, WorkMate, SCM-Manager Universe, Evada studio, SprintCost, LifeTracker, KnightSpear, The Daily Project, Trixi, Nuvro, NaSMail, Scrumpy, Pareto CRM, HelgApps, TIEMCHART, Managly, Bluemail for mac, Scrumi, WorkZone, InboxZero, Instant Team, Jixee, Email.biz, AlchemyWorks Projects, TeamHub, ChiliProject, Rillsoft Project, SpiraPlan, Bugilo, PlanShell, Arrangedly, Wolveson, Qlutter, Enpointer are some alternatives to OpenProject.