ChatGPT helped me build an AI app that scaled fast – and sold faster
I didn’t plan to start a tech company. But ChatGPT gave me the building blocks of a tool that went viral, generated $300K in revenue, and was acquired by a mid-size SaaS startup – all in 30 days.
I’m not a developer.
I didn’t raise money.
I just solved a simple problem with a ChatGPT wrapper, good prompts, and a clean UI.
Here’s exactly how I built, scaled, and sold the app – and how you can do the same with nothing but an idea and Chatronix.
ChatGPT became the backend for my no-code SaaS idea
The original problem was simple: my friends in sales couldn’t write fast, personalized outreach emails. So I asked ChatGPT to help.
Prompt:
“Write a cold outreach email to a tech lead at a fintech company. Keep it under 100 words, casual tone, personalized based on their latest blog post.”
The results were. Better than the copywriters they hired.
I realized – if I could turn this into a form-based app, I could sell it.
So I used:
- Bubble for front-end
- Make for API automation
- ChatGPT API for the brains
In 48 hours, my AI email generator was live.
ChatGPT wrote my landing page, help docs, and onboarding flow
Once the MVP worked, I used ChatGPT to handle the rest.
Landing copy prompt:
“Write a landing page for a tool that writes cold outreach emails using ChatGPT. Tone: modern, confident, efficient.”
It returned:
“Say goodbye to boring cold emails. Generate high-converting, personalized outreach in seconds. Powered by ChatGPT – built for closers.”
I used ChatGPT again to:
- Create explainer videos scripts
- Write onboarding emails
- Draft a Notion-based help center
I never touched Figma or hired a copywriter. GPT handled 80% of the build-out.
ChatGPT also powered content that went viral
To get traffic, I turned to content marketing – with GPT at the helm.
Prompt:
“Write 5 Twitter threads about using AI to automate outreach. Include screenshots, numbers, and real use cases.”
One of them blew up:
“How I used ChatGPT to write 30 personalized emails in 3 minutes – and booked 5 calls.”
That tweet brought 7,200+ visits in 48 hours.
Revenue went from $0 → $8K → $50K → $300K.
All from viral posts and organic buzz.
I tracked performance and refined everything inside Chatronix
As things scaled, I needed clarity. Chatronix became my operating system.
Inside , multi AI chatbot I managed:
- 💡 Prompt versions – testing which tone worked better
- 📊 A/B testing outputs from Claude, Gemini, and ChatGPT
- 📂 Workflow history – for replicating winning results
- 🧪 Built-in AI detection preview (to keep things “human enough”)
I wasn’t guessing.
Chatronix showed me exactly which prompt got the most engagement, conversions, or replies.
Want to go from idea to exit with no code?
Your stack starts at Chatronix
Table: My Full App Workflow (30 Days to $300K)
| Phase | Tool | Action |
| Idea validation | ChatGPT | “What are common bottlenecks in sales outreach for tech founders?” |
| MVP build | Bubble + GPT API | Created form to input: name, company, offer → generates email |
| Landing copy | ChatGPT | “Write a confident headline + subheadline for cold email AI tool.” |
| Marketing | GPT + Chatronix | Created threads, blog posts, LinkedIn content. Tracked winning prompts. |
| Optimization | Chatronix | Prompt versioning, AI detection checks, Claude rewrites, Gemini cleanup |
| Exit | Flippa + Inbound | Buyer offered $300K after trying tool. GPT wrote deal summary + pitch. |
Bonus: The Prompt That Created My Killer App
Here’s the exact meta-prompt that made the tool click:
Prompt to ChatGPT:
Act like a B2B sales pro. Create a prompt template that generates personalized cold emails using GPT-3, based on name, company, industry, and last blog post. Keep the output short, confident, and CTA-focused.
Then I asked Claude to rewrite that prompt:
“Make this sound more human, like a smart SDR sending a casual but effective message.”
Final version:
“Hey [Name], loved your post on [Topic]. Made me think – we built a tool for [Problem] that might save you some time. Want me to send a quick demo?”
That template powered the whole app.
And buyers LOVED that they didn’t have to touch the prompt logic.
Why I Sold It – and What Happened Next
By week 3, I was burned out.
DMs. Demo requests. Feature bugs. Endless Stripe pings.
So I listed the app quietly on Flippa.
ChatGPT wrote the listing:
“AI-powered SaaS tool generating $10K/week, built in 48 hours with GPT API. 90% automation, minimal support. Ideal for acquisition or growth team.”
A sales tool startup contacted me.
We negotiated for 5 days.
$300,000 cash + 5% backend rev share.
Exit secured.
Final thought: You don’t need to code – just prompt like a builder
I didn’t build an AI app.
ChatGPT did.
I just gave it the right instructions.
Claude made it sound human.
Gemini made it smarter.
Chatronix made it repeatable – and scalable.
You don’t need to be a tech founder to make $300K.
You just need the right prompt stack.
Start building yours → Chatronix.ai