My Writing Twin builds an AI Style Profile so ChatGPT, Claude and Gemini write like you. Free first use case; paid plans from $49 one-time.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
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My Writing Twin is a tool that builds a personal Style Profile from your own writing, so AI assistants draft in your voice. It targets a common complaint: ChatGPT, Claude and Gemini produce text that sounds generic, uses words you would not choose and needs heavy editing.
The product is based on computational stylometry, the science used in forensic linguistics to identify anonymous authors. Its 7-dimension framework extracts more than 50 style markers, and the site cites a whitepaper with 50+ academic sources. The founder describes himself as an enterprise sales RVP in Tokyo who writes in three languages.
Setup has four steps. You choose a language, medium and audience, then collect writing samples, either pulled with AI assistance or pasted and uploaded. The analysis then covers tone, rhythm, vocabulary, sentence construction, cultural markers, language-specific patterns and signature elements, plus metrics such as sentence length and vocabulary diversity.
The result is two outputs: a 6-8K token Writing Style Profile you can read, and a 3-4K token Runtime Block built for deployment. You paste the Runtime Block into ChatGPT, Claude, Gemini or another LLM. The site estimates under 2 hours for the whole process.
The core feature is the measured Style Profile, which the site contrasts with simply telling ChatGPT to write in your style. Context detection adapts output to email versus Slack, internal versus customer, and English versus Japanese. Culture-specific handling covers Japanese keigo, French tu/vous and formality levels.
Deployment options include guides for Custom GPTs, Claude Projects and Gemini Gems, a live MCP connector and a Chrome extension. A beta cognitive layer reads ChatGPT, Claude or Gemini history for patterns like argument direction and certainty. You consent first, the raw file is deleted, and nothing merges until you approve.
My Writing Twin is a tool that builds a Style Profile from your own writing samples. You load it into ChatGPT, Claude, Gemini or another LLM so drafts sound like you. It uses a 7-dimension analysis that measures more than 50 style markers.
The first use case is free. Paid plans are one-time payments: Starter is $49, Pro is $99 and Executive is $249. Enterprise pricing is custom. An optional Edit add-on costs $29 per year, or $10 for the first year for Pro users.
Yes. The free option covers one use case (one language, medium and audience) with up to 2,000 words of samples and no card required. There is also a free Writing DNA Snapshot that needs no account.
It works with ChatGPT, Claude, Gemini and any other LLM. The site provides guides for ChatGPT Custom GPTs, Claude Projects and Gemini Gems. It also offers an MCP connector and a Chrome extension.
The site estimates under 2 hours in total. Collecting samples takes 15-60 minutes, the questionnaire and setup take 10-15 minutes, and deploying takes 10-15 minutes per platform.
Yes. Pro includes unlimited languages, and the analysis covers culture-specific patterns such as Japanese keigo and French tu/vous. Starter covers one language and up to 3 style contexts.
The Style Profile does not need regular re-running and can be used for months or years. Pro includes one regeneration. The optional Edit add-on allows unlimited regenerations, new samples, new languages and new contexts.
It suits professionals who write often with AI and want a consistent personal voice, especially multilingual writers and leaders. Agencies and teams managing multiple voice profiles can use the Enterprise plan.