Can Turnitin Detect QuillBot Humanizer? (2026 Answer)

Humanizer guidesBy the AIandSimilarityReports.com teamPublished 2026-10-214 min read

Yes, Turnitin can detect QuillBot. Turnitin's AI writing report has a dedicated category, "AI-generated text that was AI-paraphrased", for AI text revised with a paraphrasing tool or word spinner, and Turnitin names QuillBot as an example. QuillBot's AI humanizer goes further than its paraphraser, but it still leaves patterns. Here is what Turnitin shows, and what to use instead.

Can Turnitin detect the QuillBot humanizer?

Often, yes. QuillBot started as a paraphraser, and both its paraphrase modes and its AI humanizer work mainly by rewording. Turnitin added AI-paraphrase detection in July 2024 and AI bypasser detection on 27 August 2025, so text that is ChatGPT underneath and QuillBot on top is what the model was trained to spot. Results still vary by paper and by how much you edit afterwards.

What QuillBot text looks like in a Turnitin report

The AI percentage counts both plain AI text and AI text that was paraphrased or humanized.
In the older layout, QuillBot-revised passages appear under the purple "AI-paraphrased" category.
In the newer layout, they sit inside "likely generated and revised by AI".
Your similarity score may be low, because QuillBot changes words. A low similarity score does not mean a low AI score.

See how to read the AI writing report.

Is QuillBot good for Turnitin at all?

Use	Verdict
Fixing grammar in your own writing	Fine. Your own text is not AI-generated
Rewording a paragraph you wrote	Usually fine, but check the AI report
Paraphrasing ChatGPT text	High risk of an AI-paraphrased flag
QuillBot humanizer on a full AI essay	High risk. Edit heavily and check first

QuillBot vs a human editor

QuillBot keeps the AI sentence structure and swaps vocabulary. A human editor rebuilds the sentences, adds specifics and keeps your citations. That is the difference between a flagged report and the 0% report below.

Turnitin AI writing report showing 0% detected as AI after the paper was humanized by an editor — Turnitin AI writing report for a paper humanized by our editors: 0% detected as AI, and 0 AI-generated or AI-revised text. The submission ID is hidden for privacy.

Human editing service

Replace QuillBot with a human editor

Send your document and a human editor rewrites every passage Turnitin flags, in natural and clear language, until the AI writing score reaches 0%. Then the editor proofreads the whole paper for grammar, flow and consistency. No AI rewriting tools are used, so there is no humanizer pattern for Turnitin's bypasser detection to pick up.

$3.99per 200 words

Words to humanize	Price
1,000 words	$19.95
2,500 words	$49.88
5,000 words	$99.75
10,000 words	$199.50

Edited by hand until Turnitin shows 0% AI
Your meaning, headings, sources and citations kept
Humanize the whole paper or only the sections Turnitin highlighted
Upload DOCX, DOC, PDF or TXT, or pick a paper you already checked with us
Pay by card. The edited file comes back to your dashboard and by email

Get my paper humanized Ask on WhatsApp

Want proof before you submit? Check the edited file with a real Turnitin AI writing report for $3.99. See how to check humanized text.

Doing it yourself? Use StealthWriter Pro instead of QuillBot

If you would rather do the rewriting yourself, the best tool for the job is StealthWriter on its paid Pro plans. The paid plans unlock the stronger Ghost model and longer passages per run. The free plan only gives you the lighter Ninja model with short inputs, which is not enough for a full assignment.

Humanize one section at a time, not the whole paper in one go.
Read every paragraph afterwards. Fix any changed meaning, and put back technical terms, quotes and citations exactly as they were.
Add your own touches: a specific example, a sentence about your sources, your course's terms.
Run a Turnitin AI report on the result before you submit. No tool can promise 0% every time.

Try StealthWriter Pro

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Already used QuillBot? Check it first

Run the paper through a Turnitin AI report before you submit. If sentences are highlighted, rework just those, or send them to us. Our reports cost $3.99 and include the similarity report. Related: can Turnitin detect AI humanizers? and Grammarly's humanizer and Turnitin.

Frequently asked questions

Can Turnitin detect QuillBot?

Yes, often. Turnitin's AI report has an 'AI-generated text that was AI-paraphrased' category and names QuillBot-style word spinners as an example.

Does QuillBot's humanizer bypass Turnitin?

Not reliably. It mainly rewords text, and Turnitin added bypasser detection for humanized text on 27 August 2025.

Is it safe to use QuillBot on my own writing?

Grammar fixes and light rewording of text you wrote yourself are low risk, but check the AI report before you submit.