H2O.ai is an open-source machine learning platform that provides fast, scalable AutoML alongside a full suite of supervised and unsupervised learning algorithms capable of handling very large datasets. Its H2O AutoML component can train and tune dozens of models automatically and produce a leaderboard of the best performers, accelerating the modelling phase of data science projects. H2O Driverless AI extends this with explainability tools and automatic feature engineering, making it a serious platform for enterprise data science teams working on high-stakes prediction problems.