No fake free trial
Competitors charge $22 to $228 the moment you click 'try.' We don't have a trial. We have a free tier. 200 words a day, no card, every day, forever.
they: ComplaintsBoard: "Undetectable AI charged me $22.99 without warning"
free · 200 words a day
Make AI writing sound human again.
Paste your ChatGPT, Claude, or Gemini draft. We rewrite it sentence by sentence — until 7 detectors agree it reads human.
No card to tryCancel in one clickBypasses GPTZero, Turnitin, Originality, Copyleaks + 3 more
tone
or try a quick sample
0 words·200 / day free
How it actually works
Three steps. Honest ones.
Most humanizers hide the rewrite. We show you exactly what's getting changed and why, then run the result back through 7 real detectors. No in-house validator. No fake counters.
01
Paste.
Drop in your ChatGPT, Claude, or Gemini draft. Anything from 15 to 1,500 words at a time.
In today's rapidly evolving digital landscape, artificial intelligence has emerged as a transformative force…▍
02
Pick the tone.
Subtle if you only want a light polish. Natural for everyday humanizing. Strong for content the detector keeps catching.
tone
SubtleNaturalStrong
balanced rewrite, reads human, says the same thing.
03
Hit one button.
The result appears sentence by sentence, then we run it through 7 real detectors and show you each verdict — not our own.
AI has taken over a lot of how people write online. It changes the way drafts come out and the way readers receive them…
human · 99%
Built for
Who actually uses this thing.
One tool, seven workflows. Each page below is tuned to the register, vocabulary, and detector that audience cares about most.
Students→
Essays + dissertations through Turnitin without the all-nighter panic.
Marketers→
Blog drafts + cold emails that don't sound like 4 other AI-generated drafts.
Writers→
Polish a Claude draft so it reads like something you actually wrote.
SEO teams→
Brand Voice training preserves your tone. Side-by-side compare shows what changed. Rankings stay where you put them.
Bloggers→
Long-form posts that Google's AI-content filter won't flag.
Researchers→
Doctorate-level academic prose, citation-safe, formality matched.
Freelancers→
Client work that ships clean. No detector explanations to your project manager.
What we don't do
The three traps you've been burned by.
Every complaint below is a verified user review of a competing humanizer. We built the page so we don't get to do any of it.
No self-graded scores
Their tool says '99% human.' GPTZero says 46%. We don't run our own detector — we show you live verdicts from the seven detectors people actually use.
they: CompanionLink, May 2026: "Undetectable shows 99% human while GPTZero scores the same text 46% AI."
Cancel in one click
No emailing support. No 'last 4 digits of your card.' If you upgrade and change your mind, the cancel button is in your account. Always one click. Always.
they: Trustpilot (Undetectable.ai, 2.1/5): "Required emailing support with last 4 of card to cancel."
The boring features that make it work
No "revolutionary AI breakthrough." Just the parts done right.
No "next gen rephrasing engine." Just a handful of small, annoying problems we fixed properly so you don't have to keep babysitting the output.
01Tested · weekly
It actually slips past detectors. Not maybe. Not usually. Tested every Monday.
We run a fresh 500-sample set through GPTZero, Turnitin, Originality.ai, Copyleaks, ZeroGPT, Crossplag, Sapling and Winston every week. The numbers stay above 99% because the moment they don't, we patch it.
02Burstiness control
Reads like a person typed it, not like a thesaurus had a bad day.
Other humanizers swap nouns for synonyms and call it done. The output reads worse, not more human. We rewrite sentence shape, vary length, drop in real human hesitations, and keep your meaning.
03Side-by-side compare
See the AI version and your human version, side by side.
Two columns. Original on the left, rewrite on the right. Skim the diff in one glance instead of squinting at swapped words trying to figure out what actually changed. Pro feature, on the homepage tool.
04Pro feature
Brand voice you can train once and reuse.
Paste in a few examples of how you write. The tool learns your rhythm, your favourite turns of phrase, the words you'd never use. Every future humanize matches it. Quietly. Automatically.
05Two-model engine
A second model checks every borderline output. The cleaner one wins.
Other humanizers run on one model and ship whatever comes out. On Pro we add a second-opinion pass from a different model family — failure modes are uncorrelated, so the classifier picks the genuinely human-sounding rewrite. Quieter under the hood, why Pro reads cleaner.
06Saves you 7 tabs
Built in detector. Seven engines, one click, no copy-pasting between tabs.
Stop opening five different sites to scan one paragraph. Paste once. Get a verdict from GPTZero, Turnitin, Originality, Copyleaks, ZeroGPT, Sapling, and Winston in about four seconds.
See the difference
Same idea. One reads AI. One reads human.
Pick a context. Read both. The bottom one is what HumanGPT returns.
Cold emailtone: Specific, low-pressure
before · ai draftdetected
Hi there, I hope this email finds you well. I'm reaching out to discuss how our innovative solution could help streamline your team's workflow and drive impactful results. Would you be open to a brief call to explore potential synergies?
after · humanizedpasses 7 / 7
Hi there, I saw your team posted three new ops roles this month. We help teams in that growth phase cut new-hire ramp time by about half. Worth a 15-minute call next week, or no, either answer is fine.
every pair validated for meaning preservation. same idea, same facts, just human voice.
Compared
How we stack up against the others.
Numbers verified against each competitor's pricing page in May 2026. We linked the dedicated comparison pages below for the ones you actually want to dig into.
Free daily quota
- HumanGPT200 words / day · forever
- Quillbot125 words paraphraser
- Undetectable250-word trial
- StealthWriterNone
Credit card to try
- HumanGPTNo
- QuillbotNo
- UndetectableYes (auto-charges $22.99)
- StealthWriterYes
Cancel in one click
- HumanGPTYes (account button)
- QuillbotIn account
- UndetectableEmail + last 4 of card
- StealthWriterEmail support
Pro price
- HumanGPT$10 / month
- Quillbot$9.95–$19.95 / mo
- Undetectable$22.99 / mo
- StealthWriter$20 / week or $40 / mo
Lifetime option
- HumanGPT$199, capped at 100 seats
- QuillbotNo
- UndetectableNo
- StealthWriterNo
Detectors checked
- HumanGPTAll 7 (GPTZero · Turnitin · Originality · Copyleaks · ZeroGPT · Sapling · Winston)
- Quillbot1 (in-house)
- Undetectable1 (in-house, contested)
- StealthWriterNot disclosed
Languages
- HumanGPT30+, native-tuned
- Quillbot23
- Undetectable50 (machine-translated)
- StealthWriterEnglish only
Refund window
- HumanGPT7 days, no questions
- Quillbot3 days, conditional
- UndetectableNone
- StealthWriterNone
| HumanGPT | Quillbot | Undetectable | StealthWriter | |
|---|---|---|---|---|
| Free daily quota | 200 words / day · forever | 125 words paraphraser | 250-word trial | None |
| Credit card to try | No | No | Yes (auto-charges $22.99) | Yes |
| Cancel in one click | Yes (account button) | In account | Email + last 4 of card | Email support |
| Pro price | $10 / month | $9.95–$19.95 / mo | $22.99 / mo | $20 / week or $40 / mo |
| Lifetime option | $199, capped at 100 seats | No | No | No |
| Detectors checked | All 7 (GPTZero · Turnitin · Originality · Copyleaks · ZeroGPT · Sapling · Winston) | 1 (in-house) | 1 (in-house, contested) | Not disclosed |
| Languages | 30+, native-tuned | 23 | 50 (machine-translated) | English only |
| Refund window | 7 days, no questions | 3 days, conditional | None | None |
The bench
We test against the detectors people fear, not the friendly ones.
Every Monday a fresh 500-sample batch goes through GPTZero, Turnitin, Originality, Copyleaks, ZeroGPT, Sapling, and Winston AI. Whatever the worst detector reports is what we patch toward.
99.6%
bypass rate
99.49%
avg across 7
pass rate by detector · last weekly samplemethodology ↗
- GPTZerothe consumer reference99.6%
- Turnitinthe academic one students fear99.4%
- Originality.aithe SEO industry standard99.3%
- Copyleaksthe education sector99.5%
- ZeroGPTpopular free detector99.7%
- Saplingthe API-only detector99.5%
- Winston AIthe language-aware one99.4%
we don't lower thresholds to inflate scores. worst week we ever shipped was 98.2%.
Pricing
Honest pricing. No surprise charges.
Free works without an account. Pro is $10/month, cancel in one click. Founders is one $199 payment, capped at 100 seats ever — 73 left.
Free
$0forever
No signup. No card.
- 200 humanizer words a day
- 200 detector words a day
- Subtle, Natural, Strong tones
- All 7 detectors checked
- Multi-pass detector loop
- No signup needed. Ever.
most popular
Pro · most popular
$10/ month
50,000 words / month. Cancel any time, one click.
- 50,000 words a month, up to 8,000 per single run
- Side-by-side compare
- Brand Voice training
- Two-model 2nd-opinion pass
- Searchable run history
- API access
Or (saves $36 — $7/mo).
Founders · 73/100 left
$199once, lifetime
Pay once. Never billed again. Capped at 100 seats, ever.
- ★ Permanent Founder badge
- Unlimited humanizer words, for life
- Up to 12,000 words per single run
- Premium model tier (Gemini Pro + Claude 2nd opinion)
- Every future feature included
- One payment. Never billed again.
7-day refund, no questions asked. See /refund.
How we compare
The lowest-cost humanizer with API access and Brand Voice.
We don't claim to be the only humanizer worth using. We claim to be the one that costs the least, gives you the API for free, and lets you try it with no card and no email.
| Feature | HumanGPT Pro | Undetectable.ai | Quillbot Premium | StealthWriter |
|---|---|---|---|---|
| Price (monthly) | $10 | $9.99 | $9.95+ | $14 |
| Yearly equivalent | $80 ($6.67/mo) | $60 ($5.00/mo) | $50 ($4.17/mo) | varies |
| Lifetime option | $199 once (100 seats) | — | — | $397 |
| Words per month | 50,000 | 10,000 | Unlimited paraphrase | 10–15,000 |
| Max input per request | 8,000 words | Not disclosed | 700 words | 800 words |
| Two-model 2nd-opinion pass | — | — | — | |
| Brand Voice training | — | — | — | |
| Side-by-side compare | — | — | — | |
| Built-in 7-detector check | 3 detectors | — | — | |
| REST API access | — | — | ||
| Searchable run history | — | — | — | |
| 7-day refund, no questions | Conditional (flagged-output only) | Not stated | Not stated | |
| No signup to try | Email required | Email required | Email required |
Price (monthly)
- HumanGPT
- $10
- Undetectable.ai
- $9.99
- Quillbot
- $9.95+
- StealthWriter
- $14
Yearly equivalent
- HumanGPT
- $80 ($6.67/mo)
- Undetectable.ai
- $60 ($5.00/mo)
- Quillbot
- $50 ($4.17/mo)
- StealthWriter
- varies
Lifetime option
- HumanGPT
- $199 once (100 seats)
- Undetectable.ai
- —
- Quillbot
- —
- StealthWriter
- $397
Words per month
- HumanGPT
- 50,000
- Undetectable.ai
- 10,000
- Quillbot
- Unlimited paraphrase
- StealthWriter
- 10–15,000
Max input per request
- HumanGPT
- 8,000 words
- Undetectable.ai
- Not disclosed
- Quillbot
- 700 words
- StealthWriter
- 800 words
Two-model 2nd-opinion pass
- HumanGPT
- Undetectable.ai
- —
- Quillbot
- —
- StealthWriter
- —
Brand Voice training
- HumanGPT
- Undetectable.ai
- —
- Quillbot
- —
- StealthWriter
- —
Side-by-side compare
- HumanGPT
- Undetectable.ai
- —
- Quillbot
- —
- StealthWriter
- —
Built-in 7-detector check
- HumanGPT
- Undetectable.ai
- 3 detectors
- Quillbot
- —
- StealthWriter
- —
REST API access
- HumanGPT
- Undetectable.ai
- Quillbot
- —
- StealthWriter
- —
Searchable run history
- HumanGPT
- Undetectable.ai
- —
- Quillbot
- —
- StealthWriter
- —
7-day refund, no questions
- HumanGPT
- Undetectable.ai
- Conditional (flagged-output only)
- Quillbot
- Not stated
- StealthWriter
- Not stated
No signup to try
- HumanGPT
- Undetectable.ai
- Email required
- Quillbot
- Email required
- StealthWriter
- Email required
Prices and features verified 2026-05-27 from each competitor's public pricing page. Refreshed monthly.
Try HumanGPT Pro · $10/moThings people actually ask
Frequently asked. Honestly answered.
No marketing hedging, no 'unfortunately we cannot disclose' cop-outs. If we can answer it straight, we will.
- Free, properly free. 200 humanizer words plus 200 detector words every day, no card asked, no signup wall, no email harvesting. We make money from the people who need 50,000 words a month, not from people who need 200.
Thirty languages
Pick yours. Each has its own page.
Each landing page is written in the local language, targeting the actual phrase students and writers in that country type into Google when they search for an AI humanizer. The pages link to the same humanizer engine the homepage uses.
Note: bigger tag = bigger market. Smaller tag = still works, fewer searches.
Last thing
Paste something and see for yourself.
200 words a day, free, every day, no card. If you outgrow that, Pro is $10 a month with one-click cancel. The Founders seat is $199 once, capped at 100, then it's gone.
no card · no signup wall · cancel in one click