Stack Overflow's vendors meet the GDPR definition of "data processors." Stack Overflow engages certain vendors to process information on our behalf. In order to do so, we need to know that they (you) will help ensure the safety of our community.
Additionally, vendors who process data on behalf of Stack Overflow have an obligation to report data breaches to us. You may do so by contacting our Privacy Officer at: privacy (at) stackoverflow (dot) com.