Does QuillBot bypass Turnitin? It never says it does — and the one detector company that has tested it caught 100% of its output.
The only tool that bypassed Pangram and Turnitin in 2026.
Most humanizers clear one detector and get caught by the other. StealthWriter is the one that gets past both — run Ghost 5.2 Pro at level 7–8, section by section, and re-check before you submit.
Try StealthWriter →Key Takeaways
- QuillBot makes no bypass claim at all. Turnitin appears nowhere on its humanizer page, its detector page or its pricing page.
- It is the only tool in this cluster that also sells an AI detector — advertising a “99% detection rate” while selling humanizing as a Premium feature.
- Its help article is literally titled “Will Turnitin detect Quillbot?” — and its 61-word answer never says yes or no.
- Pangram’s August 2025 benchmark scores QuillBot at 100.0% — joint-highest detection accuracy of 20 tools. Every sample was caught.
- That is because of quality, not despite it. Pangram’s DAMAGE paper rates QuillBot L1, the top fluency tier — and notes fluent output is more detectable.
- Pangram names QuillBot directly as a “word spinner” used “even before AI to disguise plagiarism.”
- Its own older guidance concedes: “we make no guarantees if someone uses QuillBot on text generated by a tool like ChatGPT.”
The only tool that bypassed Pangram and Turnitin in 2026.
Most humanizers clear one detector and get caught by the other. StealthWriter is the one that gets past both — run Ghost 5.2 Pro at level 7–8, section by section, and re-check before you submit.
Try StealthWriter →Does QuillBot bypass Turnitin?
This is the inversion of every other page in this cluster. There is no bypass claim to examine, because QuillBot does not make one.
We checked the pages where a claim would live. Its AI humanizer page names no detector and quotes no bypass percentage. Its AI content detector page does not mention Turnitin. Its pricing page does not mention Turnitin. Turnitin does not appear at the point of payment, or anywhere in the product marketing.
This page reports no first-party test; everything below was fetched on 31 August 2026.
The help article that refuses to answer
The only Turnitin content anywhere on QuillBot’s estate is a help-centre article, last updated 10 June 2026, titled — word for word — “Will Turnitin detect Quillbot?”
Its entire body: “Quillbot was created to help users improve their own writing, not to help users paraphrase someone else’s writing and pass it off as their own. If you are using Quillbot properly, there should be no fear or worry of plagiarism.”
Sixty-one words that answer a different question. The title asks about detection; the body answers about plagiarism, which is a separate product and a separate finding. It says neither yes nor no.
That caveat covers exactly the use case this question is about: running an AI draft through a paraphraser and submitting it.
What the one real test found
QuillBot is the only tool in this cluster that appears in both of Pangram’s published corpora, and it scores worst-case in both.
| Source | What it reports about QuillBot |
|---|---|
| Pangram, August 2025 benchmark | 100.0% detection — joint-highest of 20 tools; every sample caught |
| Pangram, DAMAGE paper | L1 — top quality tier: “flowery text but still fluent and readable” |
| DAMAGE classification | Listed as a paraphraser, not a humanizer |
| Pangram body copy | Named as a “word spinner” used “even before AI to disguise plagiarism” |
The 100.0% and the L1 rating are not in tension. They are the same finding stated twice.
QuillBot produces the most fluent output of the nineteen tools audited, and it was caught every single time. Quality is the mechanism, not the exception to it. That is worth sitting with if you are choosing a tool on writing quality.
Two honest caveats. Neither Pangram document tests any tool against Turnitin — they test against Pangram’s own detector. And a 2025 result does not automatically transfer to a different detector in 2026. What it does establish is that QuillBot’s output is not hard to identify as machine-paraphrased.
Why can nobody test the Turnitin question directly?
Turnitin’s help centre states it “does not sell individual licenses or single-use subscriptions”; services go to institutions only. Inside a licensed institution, “AI writing detection reports are not visible to students”. Draft Coach, the only student-facing Turnitin product, has no AI detection.
That is why the strongest evidence on this page comes from a detector company that publishes benchmarks rather than from Turnitin itself. It is also why every rival vendor’s Turnitin percentage should be read with the same scepticism — and why QuillBot declining to publish one is, on this narrow point, better practice.
A falsification test for elsewhere: Turnitin’s documentation says “no score or highlights are attributed for AI detection scores in the 1% to 19% range”, showing an asterisk instead. Any image displaying a specific Turnitin AI figure like 3% or 12% is not a genuine current report.
The company sells both sides of the problem
QuillBot is the only tool in this cluster that also sells an AI detector, and the two products describe opposite jobs.
Its detector page claims “a 99% detection rate, according to independent evaluations from RAID”. Its humanizer page notes that “independent market research (see RAID benchmarking) shows that Quillbot is among the most accurate AI detection tools” — a claim about its detector, placed on the humanizer page. And full humanizer access is a Premium feature.
So the same company advertises being excellent at catching AI text and sells you a tool for smoothing AI text, and never once claims the second defeats anyone’s version of the first. Whatever else that is, it is internally consistent in a way most of this market is not.
What can be checked on Turnitin’s side?
Very little. Turnitin shipped paraphrasing detection in July 2024 and dedicated bypasser detection in August 2025, publishing no accuracy figure for either since. It has never published an overall accuracy percentage. On 4 August 2026 it merged the AI-paraphrased highlight into AI-generated, removing the last signal instructors had.
Independently, Hadra, Cambridge and Mesbah (February 2026, 192 texts) measured Turnitin at 0.61 overall accuracy and 0.51 recall, performing poorly on hybrid human-and-AI text. Weber-Wulff et al. (2023) put field-wide accuracy on machine-paraphrased text at 26%, with Turnitin the best of 14 tools tested — and QuillBot was one of the paraphrasers in that study’s design.
What should you take from this?
QuillBot is not sold as a detector-evasion tool, and it should not be bought as one. The only company that has published a result on it caught 100% of its output, and the reason is the thing people like about it: the writing is fluent, and fluent machine-paraphrasing is exactly what these detectors are trained to spot.
Its own guidance already tells you this, twice — once by refusing to answer its own help article’s title, once by conceding it makes no guarantees on ChatGPT-generated text.
Turnitin’s own guidance says its model “may misidentify human-written, AI-generated, and AI-paraphrased text, so it should not be used as the sole basis for adverse actions against a student”, and four universities have disabled it — Vanderbilt, Waterloo, Curtin and Washington State. The detector is unreliable in both directions.
If your real worry is being wrongly flagged on your own writing, keep your drafting history — it costs nothing and it survives a detector being wrong. It matters most for the writers detectors treat worst: ESL writers and AI detection and false positives for neurodivergent students. Check before you submit with the best pre-submission check and the Turnitin self-check, and strip the obvious tells by hand first via what to remove before using an AI humanizer.
For the same question against Pangram, see does QuillBot bypass Pangram. Other Turnitin cells: Clarity Bubble, WriteHuman, Ryne AI, UnAIMyText, AuraWrite, Text Polish, HueWrite, AiTextools, RewriteIQ, GenZWrite, GPT Scrambler, Rephrasy, StealthWriter and Phrasly.
Get the free prompt pack instead
The manual rewriting prompts that lower AI signals without a subscription — and without betting a submission on a number nobody has reproduced. Free, no card.
Frequently asked questions
Does QuillBot bypass Turnitin?
QuillBot does not claim to, and the best available evidence suggests the opposite. Turnitin is not mentioned on its humanizer page, its AI detector page or its pricing page. Pangram’s August 2025 benchmark scored QuillBot output at 100.0% detection — joint-highest of twenty tools tested, meaning every sample was caught.
Why does QuillBot get caught more, not less?
Because its output is good. Pangram’s DAMAGE paper rates QuillBot “L1” — the top of three quality tiers — describing it as producing “flowery text but still fluent and readable.” Pangram’s own analysis notes that “the more readable/fluent the humanizer text is, the more likely it is to be detected… the ‘good’ humanizers in terms of fluency are more detectable.” Fluency is the tell.
What does QuillBot’s own help article say?
Nothing, remarkably. The article is titled “Will Turnitin detect Quillbot?” and last updated 10 June 2026. Its entire body: “Quillbot was created to help users improve their own writing, not to help users paraphrase someone else’s writing and pass it off as their own. If you are using Quillbot properly, there should be no fear or worry of plagiarism.” It answers a different question than the one in its title.
Does QuillBot make any relevant admission?
Yes, in older guidance. Asked whether QuillBot is considered AI writing, it says most plagiarism checkers will not flag its use — then adds: “we make no guarantees if someone uses QuillBot on text generated by a tool like ChatGPT”, recommending users “craft the content yourself.” That caveat covers precisely the use case this question is about.
Isn’t it odd that QuillBot sells both sides?
It is the defining feature of this case. QuillBot advertises its AI content detector at “a 99% detection rate, according to independent evaluations from RAID” on one page, and sells full humanizer access as a Premium feature on the next. The two products describe opposite jobs, and the company never claims the humanizer beats any named detector.
Why can nobody test this against Turnitin anyway?
Turnitin states it “does not sell individual licenses or single-use subscriptions”, its AI writing report is instructor-facing and “not visible to students”, and Draft Coach — the only student-facing Turnitin product — has no AI detection. There is no legitimate consumer route to a Turnitin AI score, which is why the strongest evidence here comes from Pangram rather than Turnitin.
What does it cost, and can I get a refund?
Free gives paraphrasing up to 125 words in two modes, humanizing up to 125 words at six uses a day, and a limited AI detector. Premium is $8.33 a month billed annually, with promotional states shown lower. There is no general money-back guarantee: refunds are issued only where legally mandated, though EEA and UK consumers have a statutory right to withdraw within 14 days.
Is there a caveat to this page?
One, and we should state it. QuillBot’s terms of service page renders client-side and would not load for us, so its contractual warranty and academic-use clauses are unverified. Everything reported here about its academic position comes from its published help centre, not from a contract we were able to read.
