ODS.AI is the largest community in the field of data science and artificial intelligence.
We maintain the calendar of notable competitions from different competition platforms. It is possible to discuss adding your competition to the calendar (
https://ods.ai/competitions).
Also, we have our own advanced platform for running a wide range of competitions. We can hold simple kaggle-like data science contests, a competition of forecasts, benchmark for AutoML algorithms, code-based contests of agents working in a simulated environment, evaluation of predictive services in nearly-real environment, and much more.