Plain Text Studio
A web app that flags the 33 patterns of AI-written prose in your draft and rewrites them in your own voice — for marketers, students, and professionals whose work is starting to sound robotic.
Content marketers, students, and professionals whose writing is starting to sound AI-generated and want to fix it
- Paste-text checker that flags the 33 mechanical AI patterns (curly quotes, padding, 'not just X, it's Y', hedging phrases) with line numbers
- One-click rewrite suggestions that preserve your voice but remove robotic tells
- Voice profile setup that learns your natural phrasing so rewrites match your style
- Browser extension for Google Docs and Notion to flag issues as you write
A viral open-source CLI (124 stars) proves massive demand for AI-pattern detection, but the audience is developers — millions of writers, students, and marketers share the same problem with no easy tool.
GPTZero reports 8M+ users, Originality.ai and Copyleaks are well-funded, and multiple recurring 'best AI humanizer 2024' listicles (Hastewire, Twixify) confirm large sustained search volume for both detection and humanizing tools.Pricing - GPTZero ↗18 BEST AI Text Humanizing Tools In 2024 ↗
Space is heavily saturated: Phrasly, Twixify, Caktus AI Humanizer, Humanize AI, Suddenly AI, HIX Bypass and 15+ 'humanize AI' alternatives on AlternativeTo already combine detection + rewriting for non-technical audiences.Humanize AI Alternatives: Top 15 AI Writing Tools | AlternativeTo ↗Best Humanize AI Tools: Top Picks for Natural Text 2024 ↗
Proven subscription/credit models exist: Originality.ai sells 3,000 credits for $30 plus monthly plans; GPTZero runs freemium with 10K free words/month; several humanizer tools (Phrasly, Twixify) charge $10–30/mo, indicating willingness to pay.Pricing - Originality ↗AI Detector Pricing 2026: Copyleaks, GPTZero & Originality.ai Costs ↗
Underlying cat-and-mouse dynamic (detectors vs. humanizers) is ongoing, but major schools (Turnitin, GPTZero) and platforms keep raising standards; any rule-based '33 patterns' approach risks obsolescence as LLMs evolve, while demand for 'sound human' assistance is structurally durable.AI Detector Pricing 2026: Copyleaks, GPTZero & Originality.ai Costs ↗JohnCrickett/ai-writing-detector - GitHub ↗
Trivial to build a rule-based detector (pattern lists already public via Wikipedia 'Signs of AI Writing') plus a rewrite pass via OpenAI/Anthropic API; JohnCrickett's reference implementation is a Next.js app with ~44 commits and a working web UI shipped.JohnCrickett/ai-writing-detector - GitHub ↗