You can send survey reminders to participants who have not yet completed their survey after a certain period of time. This cannot be done automatically at the moment, but it is quite straightforward to do manually.
In the 'Surveys' tab, use one or more of the filters in the top to easily select the surveys you would like to send the reminder for. You can filter on institute, survey name, and date sent (for example, you can use the 'before' option). For 'completion status', select 'Sent' for surveys that were sent but not started or 'In progress', for surveys that were started but are still not completed.
From the resulting list, select the applicable survey invitations and click the 'Resend invite' button in the bottom:
You will be asked whether you want to re-use the previously sent invitation subject and email text or write a new invitation text. If you select 'Send with previous text', the same email will be sent to the participant, with the same subject, thus if you would like to indicate that it is a reminder, then it is best to write a new text.
The '(Re)send invite' button in the survey overview will check for the correct institute rights before (re)sending a survey. If the sender does not have appropriate rights for an institute, the surveys will not be (re)sent and the following warning message will be shown: