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I Built a WhatsApp SaaS in 7 Days (Here's How)

SAM

SAM

Writer @ Saya Webworks

January 18, 2026
6 min read
SaaS Building Timeline

The "MVP" Trap

Most founders spend 6 months building a "Minimum Viable Product" that isn't minimal at all. They obsess over scalable architecture, perfect design, and edge cases. I did the opposite. I ruthlessly cut features until it hurt.

The "Speed Stack"

To ship fast, I leaned on a battle-tested stack:

  • **Frontend:** Next.js (App Router) + Tailwind CSS
  • **Backend:** Supabase (Auth + Database in 5 mins)
  • **Payments:** Stripe (Payment Links)
  • **AI:** OpenAI API (for the smarts)

Day 1-3: Core Mechanics

I focused solely on the "hook" - the WhatsApp connection. No dashboard, no settings page. Just a QR code scan and a successful connection message. If that didn't work, nothing else mattered.

The Result

By Day 7, I posted on Twitter. I got my first 3 paying customers ($29/mo) within 4 hours. The code was messy, but it worked. Speed is the only advantage indie hackers have. Use it.