Is QuillBot AI Detector Accurate? Complete Guide for Students (2025)

Is QuillBot Ai detector accurate? Discover how QuillBot compares with Turnitin, GPTZero, & other AI checkers for essays, coursework, & dissertations.

Why Accuracy in AI Detection Matters?

Is QuillBot AI Detector Accurate in 2025? Compared with other AI tools

Artificial intelligence, such as ChatGPT, QuillBot, and Jasper, are becoming more widespread. Business and schools are concerned about identifying writing that is AI-generated.

“The AI detectors will come to the rescue, but to what extent are they effective?”

An AI Detector that is attracting attention is that of QuillBot. Many students ask:

Is QuillBot AI detector, correct?
How Accurate is QuillBot AI Detector, in comparison to Turnitin?

This article takes a closer look at such questions. It provides a comparison between QuillBot and Turnitin, Grammarly AI Detector, and GPTZero, allowing you to choose a tool that you can rely on.

To get assignment tips, students at the University of the UK can also not afford to miss our guide on how to write an essay with transition words and essay writing strategies. (”Top 10 Mistakes You do While Writing an Essay”).

What Is QuillBot AI Detector?

QuillBot is famous due to its paraphrasing feature, but it has already added an AI Content Detector that informs you about how much of your writing was most likely created by AI.

Easy to use Interface: All you have to do is copy and paste your text and you will see the result immediately.
Free: The AI check in QuillBot is free, as opposed to other tools, which are paid. Pay attention to GPT
Models: It is trained to identify writing of ChatGPT and GPT-4.

Learn more about QuillBot’s official features here. (https://quillbot.com/ai-content-detector)

Is QuillBot AI Detector Accurate?

The brief answer to it is yes, to a certain degree, although not flawlessly. QuillBot is a good free AI detector among students, but its effectiveness depends on the nature of content.

QuillBot AI Detector Strengths.

QuillBot works well on shorter and less technical human-written text like:

Essays under 300 words
Academic paragraphs.
Reflections or opinion-based course work.

In such situations, Quillbot frequently claims the article is 80 90 percent human content and this is encouraging.

QuillBot AI Detector has a number of weaknesses.

Paraphrased AI Text

When the ChatGPT or Gemini essay is copied and revised using QuillBots rewriters, it is frequently being unrecognised by its detector as paraphrased.

Mixed Human + AI Essays

QuillBot is prone to regarding as a false negative an essay that combines a human introduction with AI-written body text.

False Positives

In some cases, it is all human work that is marked as a partially AI, which can create an issue when originality is an issue.

Example Test: QuillBot vs. Its Own AI Detector

As an example, we ran a 500-word ChatGPT essay through the paraphraser of the QuillBot and verified it with the AI detector of the QuillBot.

Feedback Result

QuillBot rated the text as 70 percent human-written.

Comparison → The same essay, submitted in Turnitin, was rated at 90% AI-generated, which demonstrates that QuillBot underestimates the role of AI in some instances.

Issue → This demonstrates that QuillBot may be overly permissive in terms of text rewritten using their own tools.

Concern

As much as QuillBot can be helpful to scan a paper quickly and free of charge, it cannot be the only detector of academic papers.

How Accurate Is QuillBot AI Detector Compared to Turnitin?

One of the most searched queries is: Is QuillBot AI Detector accurate as Turnitin?

Feature	QuillBot AI Detector	Turnitin AI Writing Detection
Accuracy	Moderate (70-80% on average)	Higher accuracy (85-95%)
False Positives	Common in creative essays	Less frequent but possible
Database Strength	No plagiarism check	Massive academic database
Cost	Free	Paid (institutional access only)
Best For	Quick AI checks	Academic integrity reports

Turnitin remains the most appropriate to universities. QuillBot is more effective with those students who get a quick check prior to submitting.

See Turnitin’s AI detection announcement. https://www.turnitin.com/

Is QuillBot an Accurate AI Detector Compared to Grammarly & GPTZero?

Comparing the AI detector of QuillBot to Grammarly and GPTZero, you will notice that QuillBot can be useful, however not the most preferable. All the tools possess advantages, disadvantages, and the level of accuracy varies. These differences are known to students in case they base their school work on them.

The reason Quillbot is popular among students is that it is free, quick and easy. But it may get lost with the essays that include paraphrased content and original text. Grammarly and GPTZero are superior to a point, but there are also limitations.

QuillBot Vs. Grammarly

Grammarly has introduced AI detector, along with grammar and plagiarism checkers. Grammarly is generally more cautious of what it refers to as AI as compared to QuillBot.

The positive aspect of Grammarly; is that it can more effectively identify writing that appears to be written by AI but which has been refined by a human. Indicatively, when a student makes some corrections in a ChatGPT essay, Grammarly is more prone to identify it properly compared to QuillBot.
Not so good regarding Grammarly; its AI detection is new and thus it may be missing obvious AI writing. Moreover, you must have a paid subscription to obtain the complete needed academic features, and thus it is not as student-friendly as QuillBot.

Simply put, Grammarly is superior to QuillBot in mixed-content situations, yet may not prove the most affordable choice to students.

QuillBot Vs. GPTZero.

GPTZero became one of the earliest tools that were designed only to locate AI writing. GPTZero is more stringent and tends to be more accurate when detecting AI texts than QuillBot.

Pros of GPTZero: GPTZero works better with long essays and assignments than QuillBot does, as it can be used to write in the style of ChatGPT. The GPTZero users are less prone to students missing AI-written work.
Not so good with GPTZero: Sometimes it claims that it is written by an AI when it is written by a human. That may cause students to be unnecessarily concerned with their originality.

Comparing the three tools, it is better to use GPTZero when your essay can be described as mostly AI, and QuillBot is easier to use when you need the first check.

Tips to Use AI Detectors Effectively

Even the best AI detectors are not 100% reliable. Here’s how students can use them wisely:

Understand limitations: Detectors analyse text patterns, not intent—so creative writing may confuse them.

Cross-check results: Don’t rely on just one tool—try QuillBot, GPTZero, and Grammarly.

Revise your drafts: Humanize your text by adding personal insights, examples, and varied sentence structures.

Is the AI detector, Quillbot, Accurate in Free Mode?

The question that many people put forward is whether the QuillBot AI detector is effective with free users.

Premium version: It provides plagiarism detection, better grammar, and AI detection with better accuracy.

Free version: It offers simple accuracy but may fail to pick more sophisticated AI detection.

Sum Up!

Is Quill Bot accurate AI detector?

It can be used on a daily basis; however, it does not compete with Turnitin or more efficient AI detection software. It should be used by students initially, and then verified by more powerful tools like Turnitin or GPTZero.

Once equipped with the positive and negative aspects of AI detectors, you can confidently submit essays, and not be flagged by the AI.

FAQs

Q1. How accurate is QuillBot AI detector?

QuillBot is fairly good at identifying straight AI text, but it does not work as well when the text has been paraphrased or edited.

Q2. Is QuillBot AI detector accurate as Turnitin?

No, Turnitin remains a better option with academic essays, dissertations, and coursework.

Q3. Is AI detector QuillBot accurate for dissertations?

It is capable of catching a little text but in large projects, it is better to use Turnitin or more sophisticated AI checkers.

Q4. Is QuillBot an accurate AI detector for students?

Yes, it is good when you need to do quick checks, but you must always check with the tools of your institution when submitting it finally.

Q5. Is QuillBot free AI detector accurate enough?

The free one is so good with short essays but a paid or institutional detector is more powerful with academic work.