How do you compare Kneaver with CMS like Drupal.
Kneaver is used before a CMS
CMS starts where Kneaver is done.
CMS are good for managing texts, layouts and hierchical structures. They are good tools for managing news, finalized documents, not for designing thoughts and refining concepts.
Kneaver is about thoughts, on progress fragments of knowledge. It supports turning them into logical structures and eventually turning them into articles, maps or presentations.
A CMS start with text articles and mostly manage the way to make them available to others. It is a publishing tool.
Text articles present in CMS can be seen as a final product of Kneaver. Kneaver has the capability to integrate with popular CMS either as part of the workflow or as an editor. See Kneaver and OAuth