DataSource.ai - Community-funded data science tournaments
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.
International Data Analysis Olympiad (IDAHO) - International Data Analysis Olympiad (IDAHO) is the world’s leading ML and AI-based data science competition and contest platform that is open to students and professionals of all ages and nationalities.
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.
Kaggle - Kaggle offers innovative business results and solutions to companies.
Colaboratory - Free Jupyter notebook environment in the cloud.