Build a SaaS MVP in 24 Hours with Claude Code

The 24-Hour SaaS Challenge

I built a complete SaaS MVP in 24 hours using Claude Code. Not a landing page. Not a demo. A working product with authentication, payments, database, CRM, and real functionality. Then I deployed it to production and had my first user sign up.

This isn't a theoretical exercise — it's the exact process I now use for every new product. The combination of Claude Code, a solid boilerplate, and the right stack makes what used to take weeks achievable in a single focused day.

Here's exactly how to do it.

The Stack: Why Next.js + Supabase + Claude Code

Stack choice matters enormously when working with AI coding assistants. Claude Code excels with patterns it understands deeply, and the Next.js + Supabase combination has enough training data and clear conventions that Claude navigates it expertly.

• Next.js 14 (App Router): Server components, file-based routing, React Server Components
• Supabase: PostgreSQL database, authentication, real-time subscriptions, storage
• Stripe: Payments, subscriptions, customer portal
• Tailwind CSS + DaisyUI: Rapid UI development with utility classes
• Vercel: Zero-config deployment, edge functions, analytics

But here's the key insight: even with Claude Code, setting up this stack from scratch takes 8+ hours. Configuring auth, wiring up Stripe webhooks, creating database schemas, building CRM functionality — that's time spent on solved problems.

That's why I start with LaunchKit. It's not just boilerplate — it's a production-ready foundation with all the common SaaS features already implemented and tested.

Hour 0-2: Project Setup and Foundation

Instead of spending 8 hours on setup, I started with LaunchKit:

# Clone LaunchKit
git clone https://github.com/your-username/launchkit my-saas

# Install dependencies
cd my-saas
npm install

# Copy environment template
cp .env.example .env.local

Configure environment variables (Supabase, Stripe keys), then:

# Run database migrations
npx supabase db push

# Start development server
npm run dev

Within 30 minutes, I had a running application with:

• User authentication (email + social login)
• Stripe integration ready for payments
• Database schema with users, subscriptions, and CRM tables
• Beautiful landing page templates
• Admin dashboard foundation

Configuring CLAUDE.md

Before diving into development, I created a CLAUDE.md file to give Claude Code context:

# Project: [Your Product Name]

## Tech Stack
- Next.js 14 with App Router
- Supabase (PostgreSQL + Auth)
- Stripe for payments
- Tailwind CSS + DaisyUI
- LaunchKit boilerplate

## Core Feature
[One sentence describing what makes this product unique]

## Development Guidelines
- Use server components by default
- Keep API routes thin, logic in services/
- Use LaunchKit's existing patterns for new features
- TypeScript strict mode

## Database
Tables: users, subscriptions, leads, [your domain tables]

## Current Sprint
Building: [Core feature description]

Hour 2-8: Core Feature Development

This is where the magic happens. With the foundation in place, I focused entirely on the unique value proposition — the feature that would make users pay.

For this example, let's say we're building a customer feedback aggregator that collects reviews from multiple platforms.

Prompt to Claude Code:

Create a feedback aggregation feature. Users should be able to:
1. Connect their Google Business, Yelp, and Trustpilot accounts
2. View all reviews in a unified dashboard
3. Get AI-generated response suggestions
4. Track sentiment over time

Use the existing LaunchKit patterns for:
- Database schema (extend with feedback-related tables)
- API routes (in app/api/)
- UI components (use DaisyUI classes)

Start with the database schema and service layer.

Claude Code Response:

Claude Code created:

• supabase/migrations/add_feedback_tables.sql — Database schema
• services/feedbackService.ts — Business logic
• services/platformConnectors/ — API integrations for each platform
• app/api/feedback/ — API routes
• app/dashboard/feedback/ — Dashboard pages

Iteration Process

Development with Claude Code is conversational:

// After reviewing the initial implementation:
"The sentiment analysis is good, but let's add caching to avoid
re-analyzing unchanged reviews. Also, add a webhook endpoint so
we get real-time updates when new reviews come in."

Claude Code understood the existing code, extended it appropriately, and maintained consistency with LaunchKit patterns throughout.

Hour 8-12: Authentication and User Management

LaunchKit already had authentication configured with Supabase Auth. Claude Code helped me customize it for the specific needs:

// Prompt:
"Extend the existing auth to support team workspaces.
Users should be able to create teams, invite members by email,
and assign roles (admin, member, viewer). Use LaunchKit's
existing user table as a base."

Claude Code:

• Extended the database schema with teams and team_members tables
• Added middleware to check team membership
• Created invitation flow with email tokens
• Built team management UI components
• Updated existing pages to be team-aware

Time spent: 4 hours for complete team functionality, including edge cases like team deletion and ownership transfer.

Hour 12-16: Stripe Integration and Pricing

LaunchKit's Stripe integration was already functional. I needed to customize the pricing tiers:

// Prompt:
"Update the pricing to three tiers:
- Starter: $29/mo, 1 connected platform, 100 reviews/mo
- Pro: $79/mo, 3 platforms, unlimited reviews, AI responses
- Enterprise: $199/mo, unlimited platforms, team features, API

Update the Stripe products, modify the pricing page,
and add feature gating based on subscription tier."

Common pitfalls Claude Code helped me avoid:

• Webhook signature verification (already in LaunchKit, but Claude ensured I didn't break it)
• Handling subscription changes mid-cycle
• Proration settings for upgrades/downgrades
• Tax calculation considerations

Hour 16-20: CRM and Customer Management

This is where LaunchKit's built-in CRM shined. Most SaaS boilerplates ignore customer management — they focus on auth and payments but leave you without visibility into your users.

LaunchKit includes:

• Lead capture from landing pages
• User activity tracking
• Customer segmentation
• Email integration hooks

// Prompt:
"Extend the CRM to track feedback-specific metrics:
- Reviews processed per user
- Platforms connected
- Response rate (suggested vs. actually used)
- Sentiment trends

Add a customer health score based on these metrics."

With Claude Code extending LaunchKit's CRM foundation, I had complete customer visibility in under 4 hours.

Hour 20-24: Polish, Deploy, Launch

UI Polish

// Prompt:
"Review all pages and improve the UI:
- Ensure consistent spacing and typography
- Add loading states and skeletons
- Improve mobile responsiveness
- Add micro-interactions where appropriate"

Deployment

With Vercel, deployment was trivial:

# Push to GitHub (triggers Vercel deployment)
git add .
git commit -m "Complete MVP"
git push origin main

# Configure environment variables in Vercel dashboard
# Point domain to Vercel
# Enable Edge Functions for API routes

Launch

At hour 24, the product was live:

• Landing page with clear value proposition
• Working authentication and team management
• Core feature (feedback aggregation) fully functional
• Stripe payments accepting subscriptions
• Admin dashboard with CRM
• Production database with backups configured

What Made This Possible: The Foundation Factor

Let's break down the time savings:

• Without LaunchKit: 60+ hours minimum (likely 80-100)
• With LaunchKit + Claude Code: 24 hours

Time Breakdown Comparison

Without LaunchKit:

• Project setup and tooling: 4 hours
• Authentication system: 8 hours
• Database schema and migrations: 4 hours
• Stripe integration: 8 hours
• Landing page: 6 hours
• Admin dashboard: 8 hours
• CRM features: 8 hours
• Core feature: 12 hours
• Polish and deploy: 6 hours
• Total: 64 hours

With LaunchKit + Claude Code:

• Project setup: 2 hours
• Auth customization: 4 hours
• Stripe customization: 4 hours
• CRM extension: 4 hours
• Core feature: 6 hours
• Polish and deploy: 4 hours
• Total: 24 hours

That's 40+ hours saved — at even $50/hour, that's $2,000+ in development time. LaunchKit pays for itself on the first project.

Your Turn: Get Started Today

The 24-hour SaaS challenge is repeatable. I've done it multiple times now, and each iteration gets faster as Claude Code learns from the LaunchKit patterns.

Here's your checklist:

• Get Claude Code Pro or Max subscription
• Get LaunchKit
• Set up Supabase project and Stripe account
• Block 24 hours of focused time
• Build

Ready to build your SaaS MVP? Get LaunchKit and start your 24-hour challenge. You'll be surprised what you can ship when you're not rebuilding solved problems.