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Freemium

GPTZero

GPTZero plagiarism checker. Website screenshot.
★★★★☆
Price Level:
$$$

GPTZero's plagiarism checker is a tool created to identify copied or duplicated content by comparing submitted text with billions of web pages and academic papers.

Key Features:

  • Compares text against a vast database of online and academic content.
  • Provides detailed source attribution for proper citation and reference.
  • Ensures document confidentiality with secure scanning and data protection.

Limitations and Considerations:

  • Freemium plan (5,000 characters) requires sign-up.

GPTZero's plagiarism checker serves writers, educators, researchers, and business professionals who need to verify content originality and protect intellectual property.

This tool operates in three simple steps.

First, users copy and paste text or upload a file to the dashboard scanner.

Next, the system compares the content against billions of online documents and academic papers.

Finally, it delivers results showing similarity percentage, matched sources, and duplicate content found.

How accurate is GPTZero's plagiarism checker?

Overall score:
4 out of 5 stars (★★★★☆).
Our testing showed it is mostly accurate.
The tool gives a numerical result (score): Yes.
It detected our texts as follows:
● Completely original as
100% original
(★★★★★).
● AI-rephrased copy as
62% plagiarized
(★★★★☆).
● Fully copied as
55% plagiarized
(★★★☆☆).
Disclaimer: Results may differ. Always test personally.

FAQ

We've tested over 150 AI detectors and have a solid grasp of the market. Using our custom methodology, we ensure all tools are compared fairly. Our testing is unbiased, praising only those we believe in.

The tools on this website are tested using a specific testing method for each category. This ensures they are evaluated fairly and in a way most people would use them.

Plagiarism checkers may seem similar at first glance, but they come with different features and are intended for various use cases. Choose a tool that best suits your specific needs for the most accurate results. 

Paid tools are usually more accurate and better for advanced users needing integration and bulk checking. 

Free tools can be hit-or-miss, with usage limits and varying accuracy. 

Therefore, we suggest you check out all of our tools to find the best option for you.

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