Snorkel AI, a project from the Stanford AI Lab which recently emerged out of stealth, enables clients to input data-related expertise into a system to generate the most accurate algorithms and models possible. Data labeling for machine-learning systems can be an expensive, time-intensive process. Instead, experts provide rules they work by and not just labels, enabling the Snorkel AI system to effectively label data itself. Applications include major banks, genomics, self-driving car data and COVID patient triaging.