WRITING9
Check your IELTS essay in a couple of minutes. Get a clear and detailed report about your IELTS Essay you need to discover your weak areas and fix them.
Education · Founded 2018 · United States
- Education
- Content Creation
- SaaS
Can you vibecode this?
Yes
Essay submission, LLM-powered scoring and feedback, grammar highlighting, and vocabulary suggestions are all pure code. The stack is standard React/Express/MongoDB with Stripe. Nothing here requires a licence, human grader, or proprietary catalogue a builder must assemble themselves.
The business
Total revenueEstimated from public sources and the business’s own reporting, not independently verified.
$90K+
Verified recently
Monthly revenueEstimated from public sources and the business’s own reporting, not independently verified.
$5K+/mo
→ Steady · 60-day average
Peak month
~$6K
Best single month
Growth
+10%
Early months vs recent
Profit margin
99%
For owners
Own WRITING9? List it for sale.
Founders read this page looking for a business to build like your $5K+/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
Instant, detailed IELTS essay feedback with a band score estimate.
Problem
Students repeat the same writing mistakes without knowing what to fix.
Audience
IELTS candidates aiming for Band 7 or higher.
Business model
Weekly, monthly or yearly subscription charged through Stripe, with a money-back guarantee.
Can you vibecode this?
Yes
Essay submission, LLM-powered scoring and feedback, grammar highlighting, and vocabulary suggestions are all pure code. The stack is standard React/Express/MongoDB with Stripe. Nothing here requires a licence, human grader, or proprietary catalogue a builder must assemble themselves.
Moat
- Proprietary data
- Switching costs
Why people pay WRITING9
Writing9 has scanned thousands of IELTS essays since 2018, calibrating its scoring algorithms against British Council standards. A fresh copy has no essay history, no validated band-score benchmarks, and no 47,959-student track record to point to.
Product complexity
LowAn AI writing checker with scoring, grammar feedback and vocabulary suggestions is standard software.
Data
LowThe product uses its own trained algorithms and sample essay libraries, no external data feed required.
Integrations & infrastructure
LowStripe handles billing; no named third-party service integrations are required.
Human operations
LowFeedback is fully automated; no human tutors or reviewers are needed to deliver the product.
Regulation / hardware
LowNo licence or regulatory approval is required to sell an IELTS essay practice tool.
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
- Essay checker with band scoring, grammar feedback and vocabulary suggestions
- Weekly, monthly or yearly subscriptions with Stripe
- A landing page
Leapd runs
- Meta ads
- LinkedIn and X posts
- SEO and AI-search visibility
- A daily report of what shipped
Opportunity check
- Passes: Proven market: $5K+/mo already paid for it
- Passes: Proven model: Weekly, monthly or yearly subscription, 99% margin
- Passes: Proven need: IELTS students need essay feedback daily
- Passes: Buildable: Leapd builds it end to end
Build a web app that checks IELTS essays using AI and sells access as a recurring subscription.
Product:
- Accounts with a personal dashboard showing submission history and progress over time
- Essay submission for IELTS Task 1 (letters and charts) and Task 2 (academic and general essays)
- AI-generated band score estimate aligned with IELTS marking criteria (task achievement, coherence, lexical resource, grammar)
- Detailed feedback highlighting grammar mistakes, vocabulary repetition and idea clarity with fix suggestions
- Weakness discovery that tracks recurring errors across submissions so students see real progress
- Vocabulary and ideas generator that suggests topic-relevant words and essay templates
- Free demo that lets visitors check one essay before subscribing
- Unlimited essay submissions for premium subscribers
Billing:
- Weekly, monthly or yearly subscription via Stripe; money-back guarantee if the student does not reach their target score
Business details
Similar businesses
Questions
How much revenue does WRITING9 make?
WRITING9 has made $90K+ in revenue to date and brings in $5K+/mo, with its best month around $6K.
How does WRITING9 make money?
WRITING9 sells unlimited IELTS essay checking under a recurring subscription, billed weekly, monthly or yearly.
Is WRITING9 profitable?
Yes. WRITING9 reports a 99% profit margin.
Is WRITING9 growing?
Revenue is holding steady over the last 3 months. Since its early months, monthly revenue has grown 10%.
Can you vibecode a business like WRITING9?
Yes, with Leapd. It builds the product, then helps you find customers with outreach, ads and SEO. See the build spec →
Ready to build it?
The market is proven. The opportunity is real. Build your version with Leapd.
Build This with Leapd →Founder interest
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