v0 by Vercel, Bolt.new, Lovable, and Replit all offer real-time visual previews of generated UIs before they are committed. SaaS Factory's implementation agent goes straight from spec to PR with no visual preview step. The design.ts agent generates technical specs, but users never see a visual mockup. Competitors win on 'delight' specifically because users can see and tweak designs before code is written. The mission mentions 'obsessively serve customers with enterprise-quality experiences' — visual design previews are table stakes in 2026 for any AI build platform.