Notesnook is described as 'Fully open-source, end-to-end encrypted notes with device-based security, secure sync, offline access, powerful editor, vault, backups, and exports' and is a very popular Note-taking tool in the office & productivity category. There are more than 100 alternatives to Notesnook for a variety of platforms, including Mac, Windows, Web-based, Linux and Android apps. The best Notesnook alternative is Obsidian, which is free. Other great apps like Notesnook are Joplin, Logseq, Anytype and Notion.
Notesnook alternatives are mainly Note-taking Tools, but if you're looking for
Todo List Managers or Task Management Tools you can filter on that. Other popular filters include
Open Source. These are just examples - use the filter bar below to find more specific alternatives to Notesnook.