I am interested in using Path Analyzer. I was told that we can use, a tracking pixel (script) on our none Sitecore sites, however, I am not finding any documentation about this. Please point me in the right direction. -JMT
Have a look at the Federated eXperience Manager: https://doc.sitecore.net/sitecore_experience_platform/digital_marketing/federated_experience_manager/a_functional_overview_of_fxm
FXM allows you to capture visitor information across sites.