Textumi vs Winston AI: how the two AI detectors differ

Textumi and Winston AI at a glance

Checked on 20.10.2026. Winston AI facts come from its own website, help centre, documentation and policies; Textumi facts come from our product. Features change, so check both sites before you decide.

How each tool shows a result

Textumi places a needle on a gauge that runs from “Human” to “AI” and names the result with one of five labels, from “Human-written” to “AI-generated”. With an account you also see the passages that weighed most in the result. For a text under 50 words, it shows “Too little text to judge” instead of a label.

Winston AI gives a score from 0 to 100 and a colour-coded prediction map that marks each sentence, with a report you can download. Its API documentation says texts under 600 characters may give unreliable results and that the minimum is 300 characters.

A label and a percentage are both a model's estimate from the wording. Neither proves who wrote a text, and a percentage is not a measured share of generated text.

Which languages each detector covers

Textumi detects AI writing in 20 text languages. The English and Ukrainian detectors have the longest record. The detectors for the other languages were built and tested on a narrower set of texts, and some of them miss many AI texts in other genres, so a longer passage gives a steadier result there.

Winston AI's pages give different language lists. Its help centre names 16 languages, among them German, French, Spanish, Polish and Ukrainian, and says results in languages outside its list should not be treated as validated. Its API documentation names 14 languages and does not include Ukrainian.

Rewriting a draft: two different approaches

Textumi's Humanizer works in the same account as the detector. It rewrites a draft so that it reads more naturally and then checks the new version against your original: facts, names, numbers, exact names such as quoted labels, and the logic of each sentence. A version that fails these checks is not shown, and your original stays beside the result.

The Humanizer takes 50 to 2,000 words in English and up to 1,000 words in the other languages. It does not promise a lower score in any detector.

Winston AI does not offer a humanizer or a rewriting tool. Its tools are about checking: AI and plagiarism detection, a fact checker, a readability score, AI image detection, an essay grader and a grammar checker.

Where you can use each tool

Textumi works in four places with one account. The web workspace takes pasted text, files and public web pages. Textumi for Chrome checks and rewrites text on any web page from a side panel. Textumi for macOS keeps the AI Detector and the Humanizer on a toolbar above your other apps and needs a Mac with Apple silicon. The MCP connector lets Claude, ChatGPT and other assistants check and rewrite a text with Textumi right in the conversation.

Textumi for Chrome

Winston AI works on its website, in a Chrome extension that checks text and images, and through an API. Its MCP server connects Claude, ChatGPT, Claude Code, Cursor and VS Code and bills scans in Winston AI credits. Its pages list no desktop app.

Both services connect to AI assistants through MCP. Textumi's connector also starts Humanizer rewrites of English texts, and it is part of the MCP, Individual and Professional plans.

Privacy and history

Textumi stores submitted texts and results encrypted, and detection runs on Textumi's own servers. For rewriting, the text also goes to the external AI model provider named in our privacy policy. On Individual and Professional, your private History keeps requests for 30 days, and you can delete them earlier. A check without an account keeps no text.

Winston AI's privacy policy mentions that it stores the text and images you submit, removes them from active storage within 30 days after you delete your report or your account, and keeps encrypted backups for up to 90 days. It also mentions that submitted content isn't used for training purposes without your consent.

Who each tool suits

Winston AI suits schools, publishers and SEO teams that want AI detection together with plagiarism and fact checks, detection of AI images, text recognition from photos and handwriting, or very long documents in one scan.

Textumi suits you if you want the detector and a Humanizer with fact checks in one account, a native app on your Mac, or checks and rewrites from inside your AI assistant. It also suits you if you want to try the detector before creating an account, if you often check Ukrainian texts, or if you want rewrites checked against your original.

See Textumi plans

Sources and trademarks

Winston AI is a trademark of its owner. Textumi is not affiliated with or endorsed by Winston AI. Textumi wrote this comparison about its own product and a competitor from public information.