Sandcastles is an AI-powered platform for short-form video creators on Instagram, TikTok, and YouTube Shorts. It analyzes millions of videos daily to surface top-performing outliers in any niche and explains why they went viral. Users can generate hooks and full video scripts using proven storytelling frameworks drawn from high-view content. Sandcastles also lets creators track competitor channels, download transcripts, and organize winning ideas into project workspaces.