can I use an external panel to collect data for the survey on QuestionPro?
Yes, there are 2 things that you should understand
1/ You can use an external panel provider for your survey, all you have to do is select that in the finish option of the survey and enter the URL provided by the external panel provider.
2/ You can also purchase respondents directly from the QuestionPro panel which has a variety of respondents across the globe. This will require no integration and can be setup in a few mintues.