Like the Redactor library, Django-Redactor is licensed under Creative Commons Attribution-NonCommercial 3.0 license.

A human-readable summary can be found here: http://creativecommons.org/licenses/by-nc/3.0/

The noncommercial restrictions of the license (e.g., Section 4(b)) are waived for any user who purchases a 
legitimate commercial license to the redactor.js library.