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SupWriter

Humanize AI Text & Outsmart AI Detectors

AI · Founded 2025 · India

AI
Productivity
Content Creation
Education
Legal

Visit supwriter.com ↗Founder interest ↓

Can you vibecode this?

Yes

Text rewriting, paraphrasing, grammar checking, and AI detection scoring are all LLM API calls wrapped in a clean editor UI. The Chrome extension, MCP connector, and REST API are standard build work. One builder ships this.

Build This with Leapd →

The business

Total revenue

$7K+

Verified recently

Monthly revenue

$1K+/mo

↑ Growing · 60-day average

Peak month

~$1K

Best single month

Growth

~8×

Early months vs recent

Profit margin

82%

For owners

Own SupWriter? List it for sale.

Founders read this page looking for a business to build like your $1K+/mo one — some would rather buy one that already works. They skip the line, you get a clean exit. $25 one-time, no commission.

Why it works

Value proposition
Rewrites AI-generated text to read naturally and pass AI detectors.
Problem
AI-written text gets flagged by detectors like Turnitin and GPTZero.
Audience
Students, researchers, content writers and business professionals.
Business model
Free tier with 300 credits; paid plans billed monthly or yearly, with extra credits available to buy.

Good to know300 free creditsNo credit card requiredCancel anytimeYearly plans availableChrome extensionMCP connector

Can you vibecode this?

Yes

Moat

Proprietary data
Ecosystem embedding

Why people pay SupWriter

SupWriter claims 1.2M training samples and weekly updates tuned against 12 specific detectors, giving it a tested bypass corpus a fresh copy lacks. The API and MCP connector embed it into Claude, ChatGPT, and developer tools, adding friction to switch.

Product complexity
Moderate
Humanizer, paraphraser, grammar checker and AI detector are all standard AI-powered text processing features.
Data
Low
The product processes user-submitted text; no external data providers are required.
Integrations & infrastructure
Moderate
A REST API and MCP connector let customers use SupWriter inside Claude, ChatGPT, Cursor and VS Code.
Human operations
Low
Rewrites and detections run automatically; no human review or manual fulfillment is involved.
Regulation / hardware
Low
No regulated industry license is required to sell AI text rewriting software.

Build this business

Use the build specification below with any AI coding tool, or build it directly with Leapd.

Build This with Leapd →

Leapd builds

Web app with humanizer, AI detector, paraphraser and grammar checker
Credit-based subscriptions and one-off credit top-ups with Stripe
Claude, ChatGPT, Cursor and VS Code connections
A landing page

Leapd runs

Cold email outreach to potential customers
Meta ads
LinkedIn and X posts
SEO and AI-search visibility
A daily report of what shipped

Opportunity check

Passes: Proven market: $1K+/mo already paid for it
Passes: Proven model: Free tier; monthly and yearly subscriptions; extra credits sold separately, 82% margin
Passes: Proven need: Writers need AI text to sound human
Passes: Buildable: Leapd builds it end to end

build-spec.txt

Build a web app that rewrites AI-generated text into natural human writing and checks it against AI detectors, sold on a credit-based subscription.

Product:
- Free trial before any charge
- User accounts with a dashboard showing credit balance and rewrite history
- Humanizer that rewrites AI-generated text in multiple modes: Casual, Essay, Academic and Beast Mode
- AI detector that scores submitted text against major detection tools and returns a sentence-level breakdown
- Paraphraser with five modes: Standard, Formal, Casual, Academic and Creative
- Grammar checker with three modes: Basic, Thorough and Style
- Support for 16 content types including essays, emails, blog posts, research papers and cover letters
- Support for 100+ languages across all tools
- Inline fix tool that lets users highlight a selection to improve, shorten or fix grammar in place
- REST API with key management so customers can call humanize, detect, paraphrase and grammar-check endpoints from their own code
- MCP connector so customers can add SupWriter inside Claude, ChatGPT, Cursor and VS Code using their own API key
- Free tier granting 300 credits on sign-up with no credit card required

Billing:
- Monthly and yearly subscription plans charged with Stripe, plus one-off credit top-up purchases available at any time.

Integrations:
- Claude, ChatGPT, Cursor and VS Code connected via MCP protocol using the customer's own API credentials.

Business details

Founded

November 2025

Less than a year old

Country

India

Audience

BothStudents, researchers, content writers, SEO & Content Teams, Business Professionals, Educators & Trainers, Legal & Compliance, Researchers & Scholars

Tech stack