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Google Keep vs OpenTodoList: catalog facts
Google Keep	OpenTodoList
Free Free to use with a Google account.	Free Free and open source under the GPL-3.0 licence.
Web	Windows, macOS, Linux, Android, iOS
Quick capture of notes and checklists Reminders built in	Local-first with plain file-based storage Sync via Nextcloud, ownCloud, WebDAV or Dropbox
Requires a Google account Notes are stored on Google's servers	No hosted sync service of its own Simpler than dedicated task managers for complex projects
Web application, Hosted service	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
Account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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