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Anıl Ercan
Anıl Ercan

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How I Built a SaaS in 1 Day with AI (and Launched It)

****_A few days ago, I decided to challenge myself:

Can I build and launch a SaaS product in just 1 day using AI?

The answer was yes — and it turned into something real.

Here’s how I did it.


The Problem

Like many developers and founders, I kept making the same mistake:

Building products without validating them first.

I would spend days (or weeks) coding, only to realize that nobody actually wanted what I built.

So I needed a simple way to test ideas before investing time.


The Idea

Instead of overcomplicating things, I focused on one simple goal:

Create a tool that lets you launch a waitlist in seconds.

No complex setup. No bloated features.

Just a fast way to:

  • Collect emails
  • Measure interest
  • Validate ideas

Building with AI

This is where things got interesting.

I used AI (mainly Claude) as my coding partner.

Instead of writing everything from scratch, I:

  • Generated components
  • Fixed bugs faster
  • Structured the app quickly

It felt like having a senior developer helping me 24/7.


Tech Stack

I kept it simple and fast:

  • Next.js (frontend + backend)
  • Supabase (auth + database)
  • Vercel (deployment)
  • Claude AI (development)

Total cost: $0


What I Built

The result was WaitlistPro.

A simple tool where you can:

  • Create a waitlist in under 60 seconds
  • Share a public signup page
  • Track subscribers
  • Add referral mechanics
  • Export your data

👉 https://waitlistpro.com.tr


Key Lessons

  1. Speed matters more than perfection

    If you wait too long, you lose momentum.

  2. Validation is everything

    Don’t build first — validate first.

  3. AI is a force multiplier

    You can build 10x faster if you use it right.


Final Thoughts

This wasn’t just a coding experiment.

It completely changed how I approach building products.

Now I always validate before I build.

If you’re thinking about starting a SaaS — start small, validate fast, and use AI to move quicker.


If you want to try the tool I built:

👉 https://waitlistpro.com.tr

Would love your feedback 🙌_****

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