Second, Yandex is offering the CatBoost library as a free service, released under an Apache license, to any and all who need or want to use gradient-boosting tech in their own programs.

XGBoost XGBoost (eXtreme Gradient Boosting) is a scalable, end-to-end, tree-boosting system that has produced state-of-the-art results on many machine learning challenges.

Brian Kriegler, Richard Berk, SMALL AREA ESTIMATION OF THE HOMELESS IN LOS ANGELES: AN APPLICATION OF COST-SENSITIVE STOCHASTIC GRADIENT BOOSTING, The Annals of Applied Statistics, Vol. 4, No. 3 ...