Human-Computer Interaction (HCI) researchers at Froxt have enormous potential to impact the experience of Froxt users as well as to conduct innovative research. Grounded in user behavior understanding and real use, Froxt’s HCI researchers invent, design, build and trial large-scale interactive systems in the real world. We declare success only when we positively impact our users and user communities, often through new and improved Froxt products. HCI research has fundamentally contributed to the design of Froxt UI, Cloud, Apps serving over a billion daily users. We are engaged in a variety of HCI disciplines such as predictive and intelligent user interface technologies and software, mobile and ubiquitous computing, social and collaborative computing, interactive visualization, and visual analytics. Many projects heavily incorporate machine learning with HCI, and current projects include predictive user interfaces; recommenders for content, apps, and activities; smart input and prediction of text on mobile devices; user engagement analytics; user interface development tools; and interactive visualization of complex data.