Capacity

Capacity is an AI powered full stack app builder that takes a spec first approach, meaning you define a project brief and user stories before any code is written, which results in cleaner, more consistent output than tools that just start generating immediately. It builds production ready React and TypeScript apps with a Next.js frontend and Supabase backend, and lets you export the full codebase to deploy anywhere with no vendor lock in. There's also an AI co founder feature that works alongside you 24/7 to help plan and build. Plans start at $25 a month with a free trial available.