This will likely come as a surprise to no one, but Google has officially been rated the worst for privacy. Who’s to disagree with an organization known as Privacy International? Notes brought up include the inability to expunge your personal data, unstated duration for held data and failure to accept popular privacy practises.
If you are worried that Google might have too much info on you, and no doubt they do, you may want to consider using other services to break free from the Google Grasp (I coined it. Ok maybe not in order to avoid being sued). While I don’t necessarily disagree with their data tracking, I do disagree with the inability for a user to request an expunge of their data. They allow you to delete your GMAIL account for example, but they still keep all retained data indefinitely.
Privacy can be a touchy subject; generally people want their privacy maintained and yet the delivery of many services from Internet startups is dependent on personal data to deliver personalized content.
Source: Tech Crunch