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Most Accurate Plagiarism Checker

A modern, Al-powered plagiarism checker that is more accurate than Grammarly and Copyscape. Uphold the integrity and originality of your content with our free plagiarism checker tool below.

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The Most Accurate Plagiarism Checker: Advanced, Comprehensive, and Precise

Protect your reputation & improve your content quality by accurately detecting plagiarized content and artificially generated text

Modern plagiarism isn’t the verbatim copy and paste of yesteryear. Plagiarism has evolved to be more nuanced, subtle, and advanced — and it’s essential for online plagiarism checkers to keep up.

With the sheer amount of data being published every second, it was time to create a plagiarism checker tool that didn’t just keep pace, but was best-in-class.

With the Originality.ai suite of tools, you can complement the most accurate AI detector with the most accurate plagiarism checker.

Root out potentially plagiarized work with up to 90% accuracy.

Uncover In-Depth Insights with Our Comprehensive Plagiarism Reports

Quickly and efficiently verify any type of plagiarism with our reliable tool

Best plagiarism checker for complex types of plagiarism. The Originality.ai advanced plagiarism checker excels at detecting complex forms of plagiarism, such as global, paraphrase, patchwork, unintentional, and mosaic plagiarism.

The most reliable plagiarism checker tool
‍Streamline your editorial process. Review content for plagiarism before you publish with the industry-leading and most accurate plagiarism checker. Then, sign up to combine plagiarism checking with AI detection.
Surpasses competitors at a 3% threshold*:
Using advanced machine learning the Originality.ai plagiarism checker can:
  • Identify global plagiarism with 90% accuracy
    A superior edge over Copyscape at 76% accuracy
  • Detect patchwork plagiarism with 74% accuracy
    Most accurate of all checkers tested
*Note: A 3% threshold refers to when 3% or more of the copy matches other sources. Accuracy percentages are approximate and rounded to the nearest whole number.
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Traditional free plagiarism scanners can’t spot subtle instances like patchwork plagiarism, paraphrasing and more, but Originality.ai can.

  • Maintain Content Credibility
    ‍    Whether you’re checking student writing or upholding journalistic ethics, spotting writing issues before they turn into academic probation (or worse) is crucial to maintaining content integrity.
  • User-Friendly Interface
    ‍    Identify plagiarized content in seconds with our user-centered design. Built for ease of use and accessibility on any device.
  • Scans everything in seconds
    Our plagiarism checker quickly scans extensive content databases, highlighting matches instantly. It works with everything from research papers to search engines, providing robust plagiarism detection with adjustable depth for thorough scans.
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Features of Our Plagiarism Checker

In addition to the plagiarism checker capabilities highlighted here, we offer a comprehensive suite of tools for Editors, Marketers, and Web Publishers, including AI Detection, Fact Checking, and Readability Checking.

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Shareable Plagiarism Reports

Share your plagiarism report to prove that your writing is authentic, or showcase your strict adherence to journalistic ethics or academic integrity with shareable plagiarism reports.

Paraphrasing Detection

Advanced machine learning and plagiarism checking algorithms highlight even subtle instances of plagiarism like patchwork plagiarism, paraphrasing, and more.

Multilanguage Capabilities

Scan non-English text and compare it to multilingual text, literature or journals in Google search results for greater certainty of originality across languages.

Detailed Scan History

View previous scans and their results to compare plagiarism reports, check for duplicate content and see both highlighted passages and their plagiarism score.

Upload, Import, Paste and Check

Add your written content your way! Simply upload a document, import existing content, add a webpage URL or copy and paste.

Always Up To Date

We’re always a step ahead of new developments in AI, machine learning and NLP, so you can be confident that your plagiarism checker is always up-to-date.

Customers Love Originality.ai

View All Testimonials

After testing a number of AI content detection tools, I have found Originality.ai to be one of the best on the market. And now with the ability to detect paraphrased AI content, Orignality.ai is even more powerful. It’s basically my go-to detection tool at this point.

Glenn Gabe

SEO Consultant, GSQI.com

At Clicking Publish, producing original, high-quality content is essential to our success. To maintain these standards, it's important that we verify the work from freelancers and outsourced writers. Originality.ai makes this process easy for us by providing a simple and efficient tool that ensures the content we receive meets our expectations.

Kityo Martin

Clicking Publish

After doing some serious testing with Originality (which caters for the newerAl tech), I can't fool it (yet).


Joe Davies

Founder, FatJoe

In The Press

Originality.ai has been featured for its accurate ability to detect GPT-3, Chat GPT and GPT-4 generated content. See some of the coverage below…

View All Press
Featured by Leading Publications

Flexible Pricing

Protect your reputation & improve your content quality by accurately detecting plagiarised content and artificially generated text.

At Clicking Publish, producing original, high-quality content is essential to our success. To maintain these standards, it's important that we verify the work from freelancers and outsourced writers. Originality.ai makes this process easy for us by providing a simple and efficient tool that ensures the content we receive meets our expectations.

Kityo Martin

Founder, ClickingPublish.com

Pay As You Go

Purchase credits on an as needed basis.

$30.00

USD

one time payment

  • 3,000 credits
    ‍2 Year Expiry
    1 Credit Scans 100 Words
  • AI Detection Scan
  • Plagiarism Detection Scan
  • Text Readability Scan
  • 30 Day Scan History
  • Shareable Reports
  • No API
  • No File Upload
    docx, doc, pdf
  • No Full Site Scans
  • No Scan from URL
  • No Team Management
  • Limited Access To Future Features
Get Started

Pro

Receive monthly credits at a discounted price.

$14.95

USD

Monthly subscription

  • 2,000 credits per month
    1 Month Expiry - renews each month
    1 Credit Scans 100 Words
  • AI Detection Scan
  • Plagiarism Detection Scan
  • Text Readability Scan
  • 30 Day Scan History
  • Shareable Reports
  • Standard Support
  • File Upload
    ‍docx, doc, pdf
  • Full Site Scans
  • Scan from URL
  • Team Management
  • Tag Scans
  • Access To Future Features
  • No API
Get Started

Pro

Receive monthly credits at a discounted price.

$12.95

USD / month • Save $24.00 per year

  • 2,000 credits per month
    1 Month Expiry - renews each month
    1 Credit Scans 100 Words
  • AI Detection Scan
  • Plagiarism Detection Scan
  • Text Readability Scan
  • 30 Day Scan History
  • Shareable Reports
  • Standard Support
  • File Upload
    ‍docx, doc, pdf
  • Full Site Scans
  • Scan from URL
  • Team Management
  • Tag Scans
  • Access To Future Features
  • No API
Get Started
Monthly
Annual

Enterprise

Access the API, more credits, and priority support.

$179

USD / month

Monthly subscription

  • 15,000 credits per month
    ‍1 Month Expiry - renews each month
    1 Credit Scans 100 Words
  • Everything Included in Pro
  • Priority Support
  • 365 Day Scan History
  • API Access
Get Started

Enterprise

Access the API, more credits, and priority support.

$136.58

USD / month • Save $509 per year

  • 15,000 credits per month
    ‍1 Month Expiry - renews each month
    1 Credit Scans 100 Words
  • Everything Included in Pro
  • Priority Support
  • 365 Day Scan History
  • API Access
Get Started
Monthly
Annual

Frequently Asked Questions

What is the best plagiarism checker?

Are you wondering, ‘What is the most accurate plagiarism checker?’ — Originality.ai offers the best plagiarism checker with up to 90% accuracy in identifying global plagiarism, 38% accuracy in detecting paraphrase plagiarism, and up to 74% accuracy in detecting patchwork plagiarism.

How does the Originality.ai plagiarism checker work?

The Originality.ai plagiarism checker is a web-searched-based plagiarism detection system or Google plagiarism checker. It identifies potential instances of plagiarism by searching for matching content in Google search results.

Note: If the content doesn’t appear in Google search results, the plagiarism tool will not be able to catch it.

Does Originality.ai offer an AI plagiarism checker?

With the rise of AI content in Google, combining plagiarism and AI detection is becoming increasingly important. Complement plagiarism detection with the Originality.ai AI Detector to find instances of AI-generated text plagiarism. 

Sign up to try the best plagiarism checker for AI and complex types of plagiarism today! Then, learn about the efficacy of AI detectors in our AI Detector Accuracy Review and a Meta-Analysis of Third-Party AI Detection Studies.

Are plagiarism detectors beneficial for marketers?

Originality.ai is the most reliable plagiarism detector for content marketers, digital marketers, and web publishers. Identify potential instances of plagiarism in content so you can publish with confidence.

Is the Originality.ai plagiarism detector suitable for educators?

If educators are looking to verify potential instances of plagiarism from content in Google search results, then it’s an excellent choice. However, it’s important to note that as the detector does not scan academic or institutional databases, it may not identify instances of academic plagiarism. It’s also important to note that a plagiarism checker report should not be used as the only measure to identify academic cheating.

Learn more about our tools for educators.

AI Content Detector & Plagiarism Checker for Serious Content Publishers

Improve your content quality by accurately detecting duplicate content and artificially generated text.

· Detect AI Writing to ensure content originality
· Uncover Plagiarism to safeguard your brand's reputation
· Enhance Quality to publish engaging and high-quality content consistently
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AI & Plagiarism Detector for Serious Content Publishers

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