Have I Been Sold? - Check if your email address was sold without permission

DataSource.ai - Community-funded data science tournaments

Optery - See the private info data brokers post about you online

Machine Hack - Machine Hack is the Machine Learning competition and assessment platform that makes it easy for data scientists, engineers, and business professionals to learn, compete, and get hired.

Creep Alert - Check if friends or colleagues track you via email

Driven Data - DrivenData hosts data science competitions to build a better world, bringing cutting-edge predictive models to organizations tackling the world's toughest problems.