For five years, Resy has built out a platform helping diners secure seats at some of the most coveted restaurants around the globe, while helping restaurateurs manage their dining rooms through a series of back-end products that use data to reduce no-shows and allow restaurants to more efficiently run the books and engage customers.

Today, Resy is used by some 4,000 restaurants in 154 U.S. cities and 10 countries, and says it seats 2.6 million diners a week. But it remains a minor player compared with restaurant-booking behemoth OpenTable, which is in more than 51,000 restaurants.