Logseq
Not encrypted , but the server will never store or analyze your private notes. Your data are plain text files.
Free Notebooks
The Notebooks we recommend, filtered to Free. See all Notebooks →
Org-mode
A GNU Emacs major mode for keeping notes, managing to-do lists, planning projects, and authoring documents in plain text. Files are stored locally on Windows, Mac, and Linux; no account or cloud dependency required.