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JetWriter AI

From an indie hacker's idea to 500,000+ users. Formerly ChatGPT Writer.

500K+

Chrome users

$20K

MRR in year one

4.6

Chrome Web Store rating

Gourav Goyal
Gourav Goyal · Founder, JetWriter AI

"I had an idea and asked Vedansh to build it. He shipped the MVP, rebuilt the architecture twice as the AI landscape shifted, and scaled it to 500K+ users and $20K MRR."

Gourav Goyal
Gourav Goyal · replying

He turned my side project into my main business. Thinks like a founder, not a contractor.

Gourav had the idea. I made it real.

Gourav is a technical founder and indie hacker. He'd shipped Notion Boost, Clone Wars, and several Chrome extensions. JetWriter was one of many ideas: an AI writing assistant that lives in your browser and helps you write anywhere. He had the vision but was juggling multiple projects and needed someone to build it into his main business.

He asked me to take the idea from concept to product.

I shipped the MVP before a GPT API even existed, and installs started pouring in

When we started, there was no GPT API. None. The only way to use GPT was through the web interface. I figured out how to wrap that into a Chrome extension that could generate text on any page. We shipped it as ChatGPT Writer and started getting installs immediately.

Speed mattered. We were live and collecting feedback while competitors were still planning.

GPT released an API, Claude launched, Gemini followed. I rebuilt everything.

OpenAI released the API. Claude came out. Gemini followed. What worked last month was outdated this month.

I rebuilt the architecture so users could switch between GPT, Claude, and Gemini mid-conversation. The entire system for handling prompts, responses, and switching between AI models had to be redesigned. The extension stayed under 1MB.

User feedback drove rapid expansion: Gmail integration (learning from past emails to reply in your voice), LinkedIn, Slack, WhatsApp Web, Outlook, Freshdesk, Zendesk. Each platform with its own layout and rules for how extensions can interact. I built them all.

I built a system that learns your writing style and replies in your voice

Growth was strong. Revenue came in within six months. But there was a gap: the AI generated good text but it didn't sound like *you*.

I built a system that reads your past conversations, learns your writing style, and generates replies that actually sound like you wrote them, all running right inside the browser extension. It could also chat with any webpage or document.

This was the unlock. Users went from "this is useful" to "I can't work without this."

Results

500K+

Chrome users

$20K

MRR in year 1

4.6☆

Chrome Web Store

3

AI models supported

8+

platform integrations

<1MB

extension size

Tech Stack

TypeScriptReactChrome Extension APIsOpenAI APIClaude APIGemini APINode.jsRAG

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