Celtra has been redefining digital advertising by making it faster, smarter, and more effective since 2006. Trusted by over 450 leading advertisers and publishers—including Spotify, adidas, Unilever, Hearst, and Bloomberg—Celtra helps marketing, creative, and media teams scale their ideas to reach more customers and new heights. With global hubs in New York, London, and Ljubljana, Celtra continues to empower the world’s top advertisers to deliver impactful, on-brand advertising at scale.