Celtra Inc. is a Boston-based company that develops a creative management platform designed to streamline the lifecycle of digital advertising. Founded in 2006, Celtra provides a self-service, cloud-based software solution that empowers advertisers, publishers, and agencies to create, manage, and optimize rich media display ads across various devices, including mobile, tablets, and desktops. The platform, known as AdCreator 4, facilitates large-scale and complex advertising campaigns by offering tools for data-driven ad creation, performance optimization, and consolidated reporting. With additional locations in New York, San Francisco, London, Ljubljana, and Singapore, Celtra operates as a subsidiary of The Unilever Group, serving clients globally.