SurveyJS Library

SurveyJS Library is distributed under MIT License.

It means that you do NOT require to get any permission on using the library and may use it, modify the code freely in any type of projects.

SurveyJS Editor

SurveyJS Editor, unlike SurveyJS Library, is distrubuted under the commercial license. Unless you are working on Non-Profit, Non-commercial project, you are required to obtain the license.

Please read more about the commerical license for SurveyJS Editor here.