I Built a $2M AI Company in 72 Hours

How I went from zero to 100,000 lines of production code in 3 days—and why this might be the most documented "impossible" build ever

Few days ago, I tweeted: "Building a production-ready AI SaaS this weekend. Will document everything."

The replies were brutal:

• "Sure, buddy, another weekend project 🙄"

• "It takes YEARS to build real software"

• "This is physically impossible"

• "RemindMe! When this fails"

Well...fuck it. Here's the live product I built in 72 hours:

Folderly EmailGen AI

Folderly EmailGen AI main page

https://generate.folderly.com/

Go ahead, try it. Generate an AI email. See the 15,000+ templates in action. Check the HubSpot integration. Test the enterprise features.

I'll wait.

Here's what I actually built in 3 days:

• ✅ 100,000+ lines of production code

• ✅ 15,000 email templates processed and vectorized

• ✅ Complete AI email generation platform

• ✅ HubSpot CRM integration (the "impossible" one)

• ✅ Stripe payment processing

• ✅ Enterprise-grade analytics dashboard

• ✅ 50+ API endpoints with clean architecture

• ✅ Zapier, Make.com and N8N live.

The product is live. The code is real. The documentation is complete.

But here's the kicker: This wasn't even my first "impossible" 3-day build.

Remember my

That was just practice.

This time, I didn't just build something cool. I built something that could change how B2B sales works forever.

But here's the part that will blow your mind: everything you think you know about software development timelines is wrong.

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⚡ The Timeline That Broke Every Startup Rule

Friday 6 PM: The Spark

After my viral three-day game-building success, I became more confident than ever with AI.

Could I create something even extra complex? Something that businesses would actually pay for?

The challenge: Build a production-ready AI B2B SaaS platform in 72 hours.

The constraints:

• No team, no existing codebase, no shortcuts

• Real features, real integrations, real enterprise capabilities

• Has to be something people would actually use

The motivation: Prove that the "it takes 2 years to build a startup" narrative is complete nonsense.

Midjourney/prompt: "Imagine “oman centurion boy building a tech product”

Saturday: Day 1 - The Foundation Rush (24 hours)

• 6 AM: Coffee #1. Started with customer research on Perpexity, Deep Search (GPT), and Claude;

• 8 AM: Posted a poll: "What's your biggest B2B email pain point?" Got 147 responses in just a few hours.

• 10 AM: The clear winner is, "Emails sound generic and get ignored."

  I immediately thought that I wanted to capitalize on the content we created over the last ten years.

• 12 PM: Tech stack decision made in 15 minutes (Next.js + Supabase + OpenAI)

• 2 PM: Database designed and deployed to production

• 4 PM: Basic authentication working with Clerk

• 6 PM: First AI email generated (it was terrible, but it generated)

• 8 PM: UI mockups created and basic interface deployed

• 10 PM: Payment processing integrated (Stripe in 2 hours)

• 12 AM: MVP is completely functional

Lines written: 25,000 and only 3 coffees done as a result.

Sunday: Day 2 - The Template Empire (24 hours)

This is where it gets absolutely insane...

• 7 AM: Started building template processing system

• 8 AM: Reached out to email marketing agencies for template partnerships

• 10 AM: First agency responds with 5,000 high-converting templates

• 12 PM: Built automated processing pipeline to categorize and analyze templates 2 PM: Second agency partnership secured (10,000 more templates)

• 4 PM: Vector database populated with all 15,000+ templates

• 6 PM: AI now generating human-quality, personalized emails

• 9 PM: HubSpot integration started

• 10 PM: Breaking through HubSpot's API authentication maze

• 11 PM: HubSpot CRM integration working perfectly

Total lines: 65,000 Template partnerships: 2 agencies

Monday: Day 3 - The Enterprise Polish (24 hours)

• 9 AM: Built comprehensive analytics dashboard

• 10 AM: Added A/B testing framework for email optimization

• 11 AM: Customer support chatbot implemented

• 12 PM: Load testing and performance optimization

• 2 PM: Security audit and compliance features

• 4 PM: Enterprise SSO integration prepared

• 6 PM: Documentation written and published

• 8 PM: Product Hunt submission prepared

• 10 PM: Final testing and bug fixes

• 12 AM: 100,000+ lines milestone reached, product launched

Final architecture:

• Frontend: 35,000 lines (Next.js + TypeScript + Tailwind)

• Backend: 28,000 lines (Supabase + Custom APIs)

• AI Engine: 15,000 lines (OpenAI + Custom RAG system)

• Integrations: 12,000 lines (HubSpot + Stripe + Auth)

• DevOps/Scripts: 8,000 lines (Deployment + Monitoring)

• Analytics: 2,000 lines (Custom tracking + dashboards)

and I don’t know whether it's good or bad; I just know for sure that it’s working and I did it.

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💰 The Numbers That Made VCs Cry (Literally)

Revenue Trajectory

1. Hour 72: Product launched at https://generate.folderly.com/

2. Current status: $0 revenue, infinite potential

3. The goal: Document the path to $2M ARR in real-time

4. Your role: Watch it happen (and maybe become customer #1?)

The Unit Economics That Will Scale

• Cost per AI-generated email: $0.04

• Target revenue per email: $5.00

• Projected customer lifetime value: $2,400

• Break-even point: 12 customers

• Path to $2M ARR: 834 customers at $200/month average

• Plan to sell an annual $5,000 subscription with full functionality.

The advantage: Starting from zero with a complete product means every dollar is pure growth.

Usage-Based Pricing Strategy

• STARTER: $49/month (150 AI emails)

• GROWTH: $199/month (1,000 AI emails)

• PRO: $499/month (2,500 AI emails)

Pricing at Folderly EmailGen AI

The psychology: Users don't buy "credits", they buy confidence that their emails will get responses.

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The Features That Shocked Enterprise Clients (Built in Hours, Not Months)