By A pleasant rewriter you probably already own, and a poor reason to start paying QuillBot. The humanizer produces clean, readable text, supports five languages and sits inside a suite with a paraphraser, grammar checker and translator. It moves detector scores only a little, the free version is a sample, and QuillBot itself says it is not a detection-evasion tool.
- Best for
- Existing QuillBot Premium users and non-native writers smoothing their own drafts
- Skip if
- You are buying only to humanize, or you need detector scores to actually fall
- Price
- $19.95/mo, $13.33/mo semi-annual, $8.33/mo annual (whole suite)
- Trustpilot
- 4.8 from 14,316 reviews, for QuillBot as a whole
A humanizer that lives inside a writing suite
QuillBot started in 2017 as a paraphrasing tool built by three University of Illinois students, Rohan Gupta, Anil Jason and David Silin, and grew into one of the most used writing tools among students. Course Hero bought it in 2021. Course Hero's parent company, now called Learneo, also owns Scribbr, LanguageTool, CliffsNotes, LitCharts and Symbolab, according to Learneo's own announcement from April 2023. QuillBot's Trustpilot profile puts its audience at about 35 million users, a company figure we could not check.
The humanizer was added alongside an AI detector, and the two sit next to each other in that sidebar. There are two modes. Basic is free and works on short passages; Advanced is for Premium subscribers and rewrites more deeply. It handles English in four dialects (US, UK, Australian and Canadian), plus Spanish, French, German and Portuguese. Changes are colour-coded, so you can see which words moved, and Premium adds a "Human score" and a history of past runs.
The Humanizer improves how your writing reads, it isn't a tool for evading AI detection.QuillBot AI Humanizer page, October 7, 2026 (punctuation adapted)
That disclaimer is the most interesting line on the product page. No other tool in our humanizer comparison says anything like that, and it explains almost everything about how this one behaves.
What we read, and whose numbers they are
We did not run a private benchmark. We read the live product and pricing pages on October 7, 2026, the Trustpilot record by theme, and every published detector test of the humanizer we could trace to a named source. There are fewer than for the dedicated tools, partly because QuillBot does not market the humanizer as a bypass, so the people who test bypass claims mostly ignore it.
One source we read and then set aside as evidence: Scribbr's ranking of the best AI humanizers, which puts QuillBot first. Scribbr and QuillBot belong to the same parent company, and the article does not say so. None of the competing reviews we read point this out either. The description of the tool on Scribbr is accurate; the ranking is a sibling recommending a sibling.
How far it moves detector scores
| Detector | Before | After humanizing | Who ran it | Date |
|---|---|---|---|---|
| Three-detector panel | 99% AI | 18% to 55% AI | Toolchase (independent review) | 2026 |
| GPTZero | 95% to 100% AI | Little change (Basic); 10 to 20 point drops on some segments (Advanced) | Network Inventory Advisor forum review | 2026 |
| ZeroGPT | 90% to 100% AI | Almost no change, either mode | Network Inventory Advisor forum review | 2026 |
| Originality.ai | 92% to 99% AI | 5 to 10 points lower (Basic); some paragraphs in the 60s and 70s (Advanced) | Network Inventory Advisor forum review | 2026 |
| Turnitin, long academic text | Flagged | Advanced mode reported as insufficient | User reports compiled by eesel | 2026 |
The pattern is consistent and, given the disclaimer, unsurprising. QuillBot lowers scores a little on some detectors and barely at all on others. The best result in the table, Toolchase's 18 to 55 percent range on GPT-4 text, is still not a clean pass, and even the low end of that range is a score many institutions would still look at. In the forum review, one tester found that every short sample came back 100 percent AI on GPTZero after humanizing. The dedicated tools in our hub do more damage to detector scores than this, for better and for worse.
We think that is a reasonable design choice. A tool that moves scores aggressively also mangles sentences, and QuillBot has a large paying audience that wants its writing to read well, not just to score differently. If your problem is detection, though, this is the wrong tool, and our Undetectable AI review shows what the more aggressive approach buys and costs.
How the output reads
This is where QuillBot earns its place. Output is grammatically clean, punctuation is sensible, and it rarely introduces the odd word choices and broken clauses that come out of Undetectable AI's Stealth mode or HIX Bypass's Aggressive mode. Scribbr, whatever its ownership, is right that the tool is quick and that the colour-coded changes make it easy to accept or reject edits. The forum reviewer scored readability at about 7 out of 10.
The same reviewer named the weakness well: the result has "no voice". Personal writing comes back sounding like corporate training material, and technical sections get simplified in ways that can lose meaning. If you run your own draft through it, read the output side by side with the original and take back the sentences that were yours. That takes less time than fixing a dedicated humanizer's output, because there is less to fix.
Basic and Advanced differ more than the labels suggest. Basic mostly swaps words and tidies punctuation, which is why the forum tester saw almost no detector movement from it. Advanced restructures sentences, varies their length and occasionally merges two into one, and that is where the small score drops come from. If you are on the free tier, you are judging the weaker of the two, so a disappointing free run tells you little about Premium. A good free run, on the other hand, tells you quite a lot about the tone you will get.
A practical note for non-native English writers: this is the group the tool suits best. If your own careful, formal prose is what a detector keeps flagging, smoothing rhythm and word choice with a tool that does not invent errors is a defensible use, and QuillBot's grammar checker sits one click away.
What it costs, and what you are paying for
| Plan | Price | Per month | Humanizer | Rest of suite |
|---|---|---|---|---|
| Free | $0 | $0 | Basic mode, up to 100 words, limited use | Paraphraser up to 125 words, 2 modes, basic grammar |
| Premium monthly | $19.95 | $19.95 | Advanced mode, no word limit | All paraphraser modes, plagiarism, AI detector, summarizer, translator |
| Premium semi-annual | $79.95 | $13.33 | Same | Same |
| Premium annual | $99.95 | $8.33 | Same | Same |
| Student annual | $74.95 | $6.25 | Same | Same, with a verified student email |
| Team | From about $7.50 per seat, 2 to 10 users | Same | Admin dashboard, central billing | |
The $8.33 annual figure and the free limits are from QuillBot's pricing page as of October 7, 2026. That page did not display the monthly or semi-annual prices when we loaded it, so those come from Dupple's August 2026 review and Hack'celeration's June 2026 pricing breakdown, which agree; the team figure is Hack'celeration's. Dupple also notes the annual plan doubled from $49.95 to $99.95 during 2025, which is why some older reviews still quote $4.17 a month.
Two worked examples show where the line falls. A postgraduate student who paraphrases sources, checks grammar and humanizes about 6,000 words of her own drafts a month pays $99.95 a year, $8.33 a month, for all of it; the humanizer effectively costs nothing. A content marketer who wants 30,000 words a month to read less like ChatGPT and score lower on Originality.ai would pay $19.95 a month here and get the weaker detector result, when Walter Writes sells 30,000 words for $8 and Undetectable AI sells 10,000 for $5 a month on annual. The first person should use QuillBot. The second should not.
The free version, and the 100-word question
The Basic humanizer needs no sign-in, which is more than HIX Bypass offers. The size is a moving target. QuillBot's pricing page now says "Humanize up to 100 words, limited usage". Scribbr and eesel, both writing in 2026, describe 125 words a run and six runs a day. We go with the vendor's page and treat the six-run figure as unconfirmed.
Either way, a hundred words is a paragraph. It is enough to see what the colour-coded rewrite looks like and to judge whether the tone suits you. It is not enough to tell you how a 1,500-word essay or article will score, and you only get the gentler Basic mode. If you want to test a humanizer properly for free, StealthWriter's ten daily runs at up to 1,000 words each are far more useful; see our StealthWriter review.
What subscribers complain about
QuillBot's Trustpilot score is 4.8 from 14,316 reviews, with 87 percent five-star, and the company had replied to every negative review, usually within a week. That is one of the best records among writing tools. Read it with one caveat: the profile shows a paid Trustpilot subscription since July 2021, which normally means the company invites customers to leave reviews, and invited reviews skew positive. The score covers QuillBot as a whole, not the humanizer, and most praise is for the paraphraser and grammar checker.
The negative reviews are mostly about money. One reviewer describes a renewal that jumped from €59.95 to €99.95 with no reminder beforehand, which lines up with the 2025 price rise. Others report renewal charges they did not expect and, more recently, complaints that some features push users toward the mobile app. Humanizer-specific complaints, where they appear in reviews, are about results: Advanced mode not shifting Turnitin on longer academic work. Few people complain that the output reads badly, which is the opposite of the dedicated tools.
Reviewers consistently report a 3-day money-back guarantee for new Premium subscribers. Three days is short. If you buy the annual plan to test the humanizer, test it that week, and set a reminder before the renewal date a year later.
Privacy and the integrity question
Our searches found no data breach, regulator action or lawsuit involving QuillBot. Text you paste is processed on QuillBot's servers like any web tool, and Learneo is a large, established education company rather than an anonymous operator. On that front it is the safest humanizer we cover.
The integrity question is simpler here than for most humanizers, because QuillBot answers it itself. Its page tells you to cite generative AI if you use it and warns that passing off others' words as your own is plagiarism. We agree. Using the humanizer on a draft you wrote is editing. Using it on a generated essay you plan to submit as your own is misconduct under most policies, and since the tool barely moves some detectors, it would also be a poor gamble. QuillBot also sells the AI detector next to it in the sidebar, the same awkward pairing Superhuman now has with GPTZero; our detector comparison covers how those checkers behave.
QuillBot against the dedicated humanizers
| QuillBot Humanizer | Undetectable AI | StealthWriter | Walter Writes | |
|---|---|---|---|---|
| Cheapest paid | $19.95/mo; $8.33 annual | $9.99/mo; $5 annual | $20/mo | $8/mo |
| Humanizer words | No limit on Premium | 10,000/mo | 50 runs/day, 5,000 each | 30,000/mo |
| Free tier | 100 words, Basic mode | 250 words, once | 10 runs/day | Limited |
| Detector movement | Modest | Varies widely | Varies | Varies |
| Output readability | Clean | Needs editing | Needs editing | Needs editing |
| Also includes | Paraphraser, grammar, translator, detector | Multi-detector panel | Detector | Humanizer only |
The table makes the split obvious. QuillBot is the best value if you will use the rest of the suite, and the cleanest output of the four. The other three are better at the one job a humanizer is usually bought for, and at least one of them is cheaper if that job is all you need.
Who should use it, and who should not
Why existing users should keep it
- No extra cost on top of Premium
- Clean, grammatical output with colour-coded edits
- Five languages and four English dialects
- No word limit on Premium
- Established owner, no breach on record
- Honest about what the tool is for
Why it is the wrong first purchase
- Moves detector scores only slightly
- Free mode is about 100 words, Basic only
- $19.95 monthly is steep for humanizing alone
- Flattens personal voice
- Renewal and price-rise complaints
- Same company sells the detector and the rewriter
One more group deserves a mention: teams. At around $7.50 a seat on Hack'celeration's figures, a small content team gets a paraphraser, grammar checker and gentle humanizer for less than most single-seat humanizers cost, with central billing. For a team whose problem is tone rather than detection, that is a sensible buy.
Use it if you already pay for QuillBot, if you are a non-native English writer polishing your own work, or if you want a paraphraser, grammar checker and humanizer for one annual price. Skip it if your only goal is a lower detector score: Undetectable AI, Walter Writes or StealthWriter will do more for less. Skip it as well if you write in a strong personal voice and do not want it sanded down.
Questions readers ask about QuillBot's humanizer
Is the QuillBot humanizer free?
A Basic mode is, for short passages. QuillBot's pricing page says up to 100 words with limited use; older reviews quote 125 words and six uses a day.
How much is Premium?
$19.95 a month, $79.95 every six months or $99.95 a year, as of October 7, 2026. That buys the whole suite, not just the humanizer.
Will it get my text past Turnitin or GPTZero?
Do not count on it. Testers saw modest drops at best, and QuillBot itself says the humanizer is not built for evading detection.
Is it better than Undetectable AI?
For readable output, often. For changing detector scores, no, and Undetectable AI is cheaper on annual if humanizing is all you need.
Who owns QuillBot?
Learneo, the group behind Course Hero, which bought QuillBot in 2021. Learneo also owns Scribbr.
Can I get my money back?
Reviewers report a 3-day money-back guarantee for new subscribers. Check the date your plan renews, since renewal complaints are the main theme on Trustpilot.
Verdict
QuillBot's humanizer is the most honest tool in the category and the least effective at the thing the category is named for. It makes text read better, it does not make detectors look away, and the company says as much on its own page. For anyone already paying for QuillBot, that is a useful extra and worth keeping. For anyone shopping specifically for a humanizer, it is $19.95 a month for a gentle edit, and the dedicated tools in our comparison are a better place to start.