Lapis is an AI advertising platform that generates on-brand ad creatives and runs end-to-end campaigns across ChatGPT, Meta, and Google. It leverages a company's existing brand assets to produce image ads that match its visual identity and voice, enabling rapid iteration and A/B testing at scale. The platform supports marketing teams globally across multiple languages. Lapis was founded in 2025 and is part of Y Combinator's Fall 2025 batch.