Introduction
Scribbr is best known for its academic proofreading and citation tools. Scribbr also offers an AI detector.
The Scribbr AI Detector is powered by QuillBot's AI detector, embedded directly into the Scribbr website.
You can even see “QuillBot Privacy Policy and Terms of Service apply” at the bottom of the detector page:
This means both tools share identical detection accuracy, results, and limitations.
🧩 Why They’re the Same
Scribbr and QuillBot are both owned by Learneo, the parent company behind several writing and education platforms.
So when you use Scribbr’s detector, your text is checked by QuillBot’s detection model.
💡 Features
Scribbr's AI detector includes the same core features as QuillBot's:
- Three result categories: text is labeled as AI-generated, AI-refined (AI text that was paraphrased or edited with AI), or human-written.
- Paragraph-level feedback: highlights the specific sections it thinks are AI-generated or AI-refined.
- Paraphrasing detection: built to catch AI text that was run through a paraphraser.
- Multilingual support: checks English, German, French, and Spanish.
- No sign-up required: you can paste text and scan it right away.
Scribbr's own page even suggests trying QuillBot's AI detector if you want a more advanced check, which makes the connection between the two tools pretty clear.
💰 Pricing and Limits
Scribbr's AI detector is free, with unlimited checks and a limit of 1,200 words per submission. There's no account required.
That's more generous than QuillBot's free plan, which now limits free scans and requires Premium for regular use. Since both tools run on the same model, Scribbr is an easy way to get QuillBot's AI detection for free.
| Scribbr AI Detector | QuillBot AI Detector | |
|---|---|---|
| Detection model | QuillBot | QuillBot |
| Price | Free | Limited free scans, Premium for more |
| Word limit | 1,200 words per check | Higher limits with Premium |
| Sign-up required | No | For more scans |
| Result categories | AI-generated, AI-refined, human | AI-generated, AI-refined, human |
✅ Pros and ❌ Cons
Pros
- Free, with unlimited checks
- No sign-up required
- Uses QuillBot's reliable detection model
- Separates AI-generated and AI-refined text
- Supports English, German, French, and Spanish
Cons
- 1,200-word limit per check
- Not its own detection model
- Can still produce false positives, like any AI detector
📊 Verdict
Scribbr's AI detector is a solid free option. It runs on QuillBot's AI detector, so you get the same accuracy without paying, as long as your text is under 1,200 words per check.
For more on how the detection model performs, check out our full QuillBot review:
👉 Read the full QuillBot Review here: QuillBot Review
📌 FAQ
Is Scribbr's AI detector free?
Yes. Scribbr's AI detector is free with unlimited checks, up to 1,200 words per submission, and no sign-up required.
Is Scribbr's AI detector the same as QuillBot?
Yes. Scribbr's AI detector is powered by QuillBot's AI detector. Both are owned by Learneo, so they give the same results.
Can Scribbr detect humanized text?
Scribbr can catch paraphrased and lightly edited AI text, which it labels as AI-refined. But advanced AI humanizers like Verva rewrite the structure, phrasing, and patterns that AI detectors look for, so the text reads as human and bypasses Scribbr's AI detector.
