Notes

Local-first outliner knowledge base with block-level linking; notes stored as plain Markdown or Org-mode files on disk.

Local-first Markdown note app with linking, graph view, and a deep plugin ecosystem; files stay on disk as plain text.

End-to-end encrypted note-taking app with open source clients and a self-hostable server, owned by Proton since 2024.

Open source Markdown note app with end-to-end encrypted sync to a server you choose, including Nextcloud, S3, or WebDAV.

Hierarchical personal knowledge base with a tree-structured note store, self-hostable sync server, and per-note encryption.