ClayBird

Claybird is a full-stack AI ad agency that produces studio-quality video ads in under 72 hours at a fraction of traditional production costs. Founded in 2025 and backed by Y Combinator's Fall 2025 batch, the company uses a proprietary agentic pipeline combining single-image NeRFs, fine-tuned image editing models, and evaluation layers to deliver visually consistent, high-quality creative at scale. Claybird leverages top video generation models including Veo and Sora to generate individual shots, then edits everything end-to-end through its AI agents. The platform targets brands and startups that need professional-grade video advertising without the cost or timeline of traditional production studios. Within its first month of operation, the company signed $67k in contracts with brands including Coca-Cola, Walmart, Eight Sleep, Delve, and Mercor. The founding team includes a co-founder who trained reasoning models alongside the author of the 'Attention Is All You Need' paper, and another with product and ML experience at Google Ads and Google Search.