Serious Privacy Trackers
There are 54+ companies around world geared to monitor you very closely. They know you better than your spouse.
There are around 144+ companies in addition to google that provides analytic solutions that websites can integrate to watch your move across their websites.
There are around 136 companies that provides personalized ads that websites can integrate to generate revenue for them.
Standard website plugins trackers
Website Management Trackers
Every top website you visit integrates with average 5 different tracking companies out of 2000, so as to target your identity and improve marketability. Source here.