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Endeavour vs sleek: catalog facts
Endeavour	sleek
Free Free and open source under the GPL-3.0 licence.	Free Free and open source.
Linux	Windows, macOS, Linux
Native GNOME design Long-running project	Tasks kept in plain todo.txt files you own Runs on Linux, Windows and macOS
Linux only Aimed at personal task lists rather than team project management	Limited to what the todo.txt format can express
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.