---
title: "Prompt Genie case study - Zeroic"
description: "Zeroic built Prompt Genie's React app on AWS Amplify, Stripe subscriptions and Cognito sign-in, and cut its bounce rate 15% with faster page loads."
url: https://zeroic.in/prompt-genie
---

AI · Prompt tools

# Prompt Genie

A shared prompt library for teams, across AI models.

15% Lower bounce rate

30% Smaller code chunks

60% Smaller largest chunk

Prompt Genie homepage: manage, share and collaborate on prompts, with the prompt generator below

## At a glance

**Frontend**

React on AWS Amplify

**Speed**

Code splitting, lazy loading, WebP images

**Sign-in**

Email and Google, one profile per person

**Payments**

Stripe monthly and annual plans

## Engagement

Package MVP

Live project [prompt-genie.com](https://prompt-genie.com)

## What it does

Prompt Genie gives teams one place to write, refine and share the prompts they use with AI models, instead of losing the good ones in Slack threads. Prompts sit in a shared library with version control and role-based access, and work across several LLMs.

## What we built

We built the web app in React on AWS Amplify: the screens where people create, refine and collaborate on prompts across models. We also built the Stripe subscriptions - checkout with Stripe Elements for monthly and annual plans, upgrades, downgrades, cancellations and proration handled through webhooks, and premium features unlocked from the live subscription state.

## Faster pages, lower bounce rate

We worked through Core Web Vitals across the app. Code is split by route, images load lazily and ship as WebP, the routes people use most are prefetched, and render paths are tuned. The average code chunk got 30% smaller and the largest one 60% smaller, and the bounce rate fell by 15%.

## One email, one account

AWS Cognito kept email sign-ups and Google sign-ins in separate pools, so the same email could register twice and end up with two profiles. We added a pre-sign-up Lambda trigger that checks the email across both and turns away duplicates.

## Where it is today

Prompt Genie is live at prompt-genie.com, with a free plan, Google sign-in and a Chrome extension.

## The people behind this project

Zeroic

J

Jay

Senior engineer @ Zeroic

[Previous · B2B SaaS ComplyAssist](https://zeroic.in/complyassist) [Next · AI WordUp Tutoring](https://zeroic.in/wordup-tutoring)

## Hear from us within 24 hours.

**Prashant and Khushi** Partners @ Zeroic

Building an AI tool people pay for? We built Prompt Genie's app, sign-in and Stripe subscriptions. If you're building an AI product with paid plans, let's talk.

Rather talk it through? [Book a 30-minute call](https://zeroic.in/book)

Pages [Services](https://zeroic.in/services) [Work](https://zeroic.in/work) [Blog](https://zeroic.in/blog) [About](https://zeroic.in/about) [Guide for AI](https://zeroic.in/llms.txt)

Services [Audits](https://zeroic.in/services/ai-audit) [MVP Sprint](https://zeroic.in/services/mvp-development) [Retainer](https://zeroic.in/services/senior-developers) [Code Rescue](https://zeroic.in/services/code-rescue) [Bubble to code](https://zeroic.in/bubble-to-code) [AI development](https://zeroic.in/ai-development-company)

Industries [Marketplaces](https://zeroic.in/marketplace-app-development) [B2B SaaS](https://zeroic.in/saas-mvp-development) [FinTech](https://zeroic.in/fintech-app-development) [Telehealth](https://zeroic.in/telehealth-app-development) [EdTech](https://zeroic.in/edtech-app-development) [All industries →](https://zeroic.in/industries)

Developers [Bubble](https://zeroic.in/hire-bubble-developers) [React](https://zeroic.in/hire-nextjs-developers) [Python](https://zeroic.in/hire-python-developers) [AI & LLMs](https://zeroic.in/hire-ai-developers) [API integrations](https://zeroic.in/api-integration-services) [All developers →](https://zeroic.in/developers)

Contact [Email](mailto:zeroic.in@gmail.com) [WhatsApp](https://wa.me/919873927225) [LinkedIn](https://www.linkedin.com/company/zeroic/) [X (Twitter)](https://x.com/PrashantAbbi) [Book a call](https://zeroic.in/book)

© 2026 Zeroic [Privacy](https://zeroic.in/privacy) [Terms](https://zeroic.in/terms)

Built in India · Shipping globally

SINCE