How I Built a SaaS in 7 Days With Next.js and Claude

The full breakdown of how I built AStudio — a full AI SaaS platform — in one week using Next.js, Supabase, Clerk, and Claude AI.

AStudioMay 14, 20265 min read0 views

The Challenge

Build a full SaaS platform in 7 days. No team. Just Claude, Next.js, and coffee.

Set up Next.js 16, Tailwind CSS v4, Clerk auth, Supabase DB. Built the auth flows, database schema, and middleware.

Built all 10 AI tools using the Anthropic Claude API. Each tool has its own route, UI, and credit system.

Wired up Stripe checkout, webhooks, and the billing portal. Free → Pro → Agency tiers.

Built the full admin panel — users, leads, blog, projects, services, site settings.

Pushed to GitHub, connected to Vercel, added environment variables. Live in minutes.

Next.js App Router is the right choice for SaaS

Clerk is worth every cent for auth

Claude writes better code than ChatGPT for complex tasks

Ship fast, iterate faster

Developer and AI builder — HTML to Python to Claude AI. Building real products in public and sharing every step.