Perhaps no consumer-facing technology has changed US restaurant operations and culture more in recent years than the rise of ordering and delivery marketplaces. Third-party delivery services, often dubbed simply delivery apps for their main method of access, are platforms that connect restaurant operations to a consumer in a digital space: online, via mobile internet, or even as kiosks in physical spaces. Yes, consumers still order take-out and delivery by phone, or occasionally by logging into a favorite restaurant’s website. But for the millions of consumers who browse for meals on delivery apps, their phones take on the character of a mall food court, allowing them to choose from an array of options based on customer ratings, price, cuisine, physical proximity, expected delivery time, and — on a repeat visit — habits and past orders. The Covid-19 pandemic highlighted growth trends already well underway: the US restaurant delivery market tripled between 2015 and 2020, to a $26 billion sector, underscoring the potential for reaching a huge and still-increasing audience via these marketplaces.