The shortlist
5 things that do it. Ours is in there, labelled, not on top.
Where one of our products fits, it sits in the list with an "ours" label, never forced to the top. Ours: made by the same studio that runs this site.
A free web tool that rewrites AI-generated text to sound more natural, keeping the meaning.
- Free
- The basic web tool is free; a free Grammarly account unlocks the Humanizer agent with custom voice profiles, per the vendor page.
- Paid
- price not checked
- Best at
- Being free to try on the web, with a custom voice option once you have a free account.
- The catch
- Grammarly says plainly: "This tool is not intended to bypass AI detectors." Full functionality needs a paid Grammarly Pro subscription.
- web
- chrome
- ios
- android
- desktop
A humaniser that smooths stiff phrasing and repetitive rhythm in AI drafts, in several languages and four English dialects (US, UK, AU, CA).
- Free
- Humanize up to 100 words, limited usage, on the free plan (Premium page).
- Paid
- from $8.33 per month (billed annually)
- Best at
- Fast rewrites in UK English, with an extension for ChatGPT and Gemini on Premium.
- The catch
- The free plan humanises only up to 100 words with limited usage. QuillBot's own page says to follow your institution's AI guidelines and that passing off someone else's idea as your own, even reworded, is unethical.
- web
- apps
- browser extension
A paid humaniser sold on making AI text pass AI detection, with a money-back guarantee if the output is flagged.
- Free
- A trial limited to 250 words; paid activation needed for more.
- Paid
- from $5 per month ($60 a year, Starter, 10,000 words a month)
- Best at
- Higher word allowances than most, from 10,000 words a month on the cheapest plan.
- The catch
- The free trial is limited to 250 words. It is sold on beating detectors, and universities such as Sheffield treat passing off AI content as your own as academic misconduct.
- web
- api
A humaniser and writer marketed for bypassing AI detection, with Academic and other tones.
- Free
- The vendor page mentions a free trial without stating limits.
- Paid
- price not checked
- Best at
- Offering many extras (writer, detector, Chrome extension) alongside the humaniser.
- The catch
- Its pages market it as making text "undetectable", including for essays, which most universities treat as misconduct if submitted as your own work. Detector-passing claims are the vendor's own.
- web
- chrome
Measures the habits that read as machine-written (uniform sentence length, stock phrases) and rewrites toward natural variation. The humaniser aims at "human"; its separate polish step aims at your own measured voice.
- Free
- Free plan: one voice profile, one writing analysis and one free draft; humanise uses credits on paid plans (£12 a month and up).
- Paid
- from £12 per month (Writer; £115 a year)
- Best at
- Showing why text reads as machine-written, with a before-and-after score on up to three passes.
- The catch
- It says beating detectors "is not the promise" and that detectors are unreliable in both directions. Paid plans only for humanising, and a voice profile needs samples of your own writing.
- web
- api
The same shortlist, as a table
| Thing | Free tier | Paid from | Platforms | The catch |
|---|---|---|---|---|
| Grammarly AI Humanizerrel="nofollow noopener" | The basic web tool is free; a free Grammarly account unlocks the Humanizer agent with custom voice profiles, per the vendor page. | not checked | web, chrome, ios, android, desktop | Grammarly says plainly: "This tool is not intended to bypass AI detectors." Full functionality needs a paid Grammarly Pro subscription. |
| QuillBot AI Humanizerrel="nofollow noopener" | Humanize up to 100 words, limited usage, on the free plan (Premium page). | $8.33 per month (billed annually) | web, apps, browser extension | The free plan humanises only up to 100 words with limited usage. QuillBot's own page says to follow your institution's AI guidelines and that passing off someone else's idea as your own, even reworded, is unethical. |
| Undetectable AIrel="nofollow noopener" | A trial limited to 250 words; paid activation needed for more. | $5 per month ($60 a year, Starter, 10,000 words a month) | web, api | The free trial is limited to 250 words. It is sold on beating detectors, and universities such as Sheffield treat passing off AI content as your own as academic misconduct. |
| StealthGPTrel="nofollow noopener" | The vendor page mentions a free trial without stating limits. | not checked | web, chrome | Its pages market it as making text "undetectable", including for essays, which most universities treat as misconduct if submitted as your own work. Detector-passing claims are the vendor's own. |
| ScriptGrain humaniser ours | Free plan: one voice profile, one writing analysis and one free draft; humanise uses credits on paid plans (£12 a month and up). | £12 per month (Writer; £115 a year) | web, api | It says beating detectors "is not the promise" and that detectors are unreliable in both directions. Paid plans only for humanising, and a voice profile needs samples of your own writing. |
How we checked
What we read, and what we haven't tested yet.
On 2 October 2026 we read the vendor pages listed under sources: Grammarly's humaniser page, QuillBot's humaniser and Premium pages, Undetectable AI's pricing page, StealthGPT's humaniser and home pages, ScriptGrain's humanise and pricing pages, and the University of Sheffield's AI guidance. StealthGPT's pricing page blocked automated access, so its price isn't verified. We didn't test any of these tools hands-on.
If none of these fit
The manual way.
The manual way is to rewrite the draft yourself, which is less daunting than it sounds. ScriptGrain's own page says what detectors measure: uniform sentence length, symmetrical hedging and stock phrases such as "delve" and "it's worth noting". If it's for study, check your university's rules first: Sheffield says attempts to pass off content as your own count as academic misconduct.