Open source alternatives to ClickUp

By GitHub stars it is Plane, with 62,373 stars and a commit on 12 Nov. Choose Plane when you want issues, cycles and project pages on your own server instead of a hosted workspace billed per seat. Next come WeKan (21,169 stars) and OpenProject (17,322 stars).

Yes. The code of all 15 is public under AGPL 3.0, MIT, GPL 3.0 or GPL 2.0 or later, so you can use them with no licence fee. Running one yourself costs the server and your time to look after it, and some makers also sell a hosted plan.

Start from the job you use ClickUp for. Choose Colanode when you want chat, pages and databases in one workspace, with unlimited users on every cloud plan. Choose Kaneo when you want a plain board, list and Gantt tracker with no feature tiers that runs as one container on your server.

14 of the 15: Plane, WeKan, OpenProject, Leantime, Kaneo, Redmine, Vikunja, Kan and 6 more. Each tool's page says what it needs to run.

12 of the 15 we track had a commit in the last 30 days, among them Plane, WeKan, OpenProject and Leantime. The quietest is Colanode, last changed on 3 Apr. A recent commit shows the project is kept up, not that it will stay that way.

AGPL 3.0 (8), MIT (3), GPL 3.0 (1), GPL 2.0 or later (1), Apache 2.0 (1), MPL 2.0 (1). MIT, BSD and Apache let you change and reuse the code freely. GPL and AGPL ask you to share your changes under the same licence when you give the software to others, and AGPL also counts letting people use it over a network.

The hosting. ClickUp's maker runs the servers for you; with an open source tool the updates, backups, security fixes and support are yours, unless you take the maker's hosted plan. Features differ too, so check what each one imports and exports before you move your data.