The basic privacy option is available for all the Pro account owners ('Unlisted tours' feature), but sometimes it is not enough.
With 'Privacy & White list' tour upgrade, you can apply custom privacy settings to your tours.
Using this tour upgrade you can:
Hide your tours from Roundme;
Protect the tour with a password;
Set the list of domains allowed for embeds.
As all the other tour upgrades on Roundme, 'Privacy & White list' tour upgrade is paid per tour, has no expiry date and works independently from your 'Pro account' subscription.

Please find the step-by-step guide to 'Privacy and white list' features here.