Copyleaks Plagiarism Review

When it comes to detecting plagiarism, usually beyond copying someone else’s ideas, the perpetrator has also copied much more including other content and copyrighted material. As one of the leading content monitoring sites on the web, Copyleaks helps businesses protect their content by monitoring for duplication on other sites. As part of its suite of

When it comes to detecting plagiarism, usually beyond copying someone else’s ideas, the perpetrator has also copied much more including other content and copyrighted material. As one of the leading content monitoring sites on the web, Copyleaks helps businesses protect their content by monitoring for duplication on other sites. As part of its suite of tools, it also includes a plagiarism checker.

But how does Copyleaks’ plagiarism checker stack up to its rivals? Should you use it or are there better alternatives? Read our complete Copyleaks plagiarism review for all the details.

What is the Copyleaks Plagiarism Checker?

Copyleaks’ plagiarism checker, like others on the market, lets users upload or copy and paste content which it then checks for plagiarism. Copyleaks draws upon a variety of online databases, academic journals, and more to determine if there are any similar matches. It then returns a report showing the resulting similarities along with a percentage of similarity so that students or content professionals can make corrections and revisions accordingly.

Unlike many other online plagiarism checkers, Copyleaks also gives users the option to schedule and run scans periodically. This is particularly helpful to website owners who want to be sure their content isn’t duplicated or copied on other sites across the web.

How Does the Copyleaks Plagiarism Checker Work?

Like many other online plagiarism detectors, the Copyleaks Plagiarism Checker works by taking the content that’s submitted and breaking it down into smaller chunks. It then uses advanced algorithms to compare that text with other published documents on the web, including academic journals, billions of web pages, and other sources.

Copyleaks also allows developers to leverage its powerful API to integrate its service into learning management systems like Blackboard and Canvas so that students can check their work for plagiarism before they submit it to be reviewed.

Why Use Copyleaks Plagiarism Checker?

Copyleaks’ plagiarism checker is a cloud-based system, rather than a program that you download and install, which makes it easy for you to check your documents for plagiarism anytime, with any device that has an internet connection. In addition, Copyleaks can check multiple document formats, including Microsoft Word, PDF, and even HTML with a high degree of accuracy.  

What are Some of Copyleaks’ Plagiarism Checker’s Features?

In addition to its advanced algorithms and multiple format capabilities, copyleaks offers a number of features with its plagiarism checker, including:

Advanced Real-Time Detection – Copyleaks can identify instances of plagiarism in real-time, allowing companies to protect their valuable content and related assets from being infringed upon by third parties.

Multiple Language Support – Unlike many other plagiarism detectors, Copyleaks supports multiple languages, which is great news for international clients or those who create and publish content in several languages simultaneously.

Customizable Settings – Copyleaks allows users the flexibility to customize various settings, such as the sensitivity of the plagiarism detector or the ability to exclude certain sources.

API Integration – Copyleaks allows businesses and organizations to integrate its API into their existing workflows, systems, and processes, giving them the freedom to check documents for plagiarism within a system that they are accustomed to and familiar with.

How Does Copyleaks’ Algorithm Work?

Copyleaks leverages several advanced algorithms to accurately and precisely check for plagiarism across different sources and formats. Here’s how it works:

  1. First, Copyleaks pre-processes the submitted text by removing any formatting or special characters that could slow down the processing. It then breaks down the text into smaller chunks to make it easier to compare to its sources as well as speed up processing time.
  2. It then combines the pre-processed text with its comprehensive database of sources and notes any similarities. These databases include academic journals, web pages, books, and much more, numbering in the billions of documents.
  3. Using its advanced algorithms, it looks for matches within the submitted text. Through the use of lexical analysis, semantic analysis, and machine learning, it can uncover even subtle instances of plagiarism that might get past other plagiarism detectors.
  4. The algorithm then does a deep-dive, using fuzzy matching to uncover patterns and stylometry to check for differences in writing style.

How to Use Copyleaks’ Plagiarism Checker Step-by-Step

  1. Create an account on the Copyleaks’ website. You can use the plagiarism checker for free or choose the free version for even more features.
  2. Sign in and choose the plagiarism detection option.
  3. Click on “New Scan” to start the process with a new document
  4. Upload the document in one of the supported file formats (PDF, Word or HTML) or copy and paste the text directly into the form field.
  5. Optionally customize the settings such as which sources to include or exclude, the sensitivity level, and the language the submission is written in.
  6. Start the scan. When it is finished Copyleaks will furnish you with an online report.
  7. When you have the report, you’ll see any instances of plagiarized content highlighted as well as a percentage of similarity. You can then optionally update or rewrite the content in order to avoid plagiarism.

Troubleshooting Common Issues with Copyleaks’ Plagiarism Checker

Although Copyleaks is a very thorough and accurate plagiarism scanner, some users do run into problems, including:

Slow Processing – Copyleaks compares submitted text to a database of billions of web pages and documents. The process understandably takes time, but if it’s too slow for your liking, try breaking up your large text document into smaller sections or otherwise keep formatting to a minimum.  

Unsupported Formats – Copyleaks may not support certain file formats so it’s recommended that you convert your file to a commonly supported format like .doc (or .docx), PDF or HTML.

Misconfigured Settings – In some cases, the sensitivity level of the plagiarism checker can be too high, or it may consistently repeat instances that you’d rather it exclude. Don’t hesitate to play with the settings to get the right level of detection and exclude or include the sources you feel would best reflect an accurate plagiarism scan.

Advantages of Using Copyleaks’ Plagiarism Checker

As Copyleaks is one of the more advanced plagiarism checkers we’ve reviewed, there are several advantages to using it over comparable plagiarism tools. For example, its cloud-based availability means you can use it from anywhere as long as you have an internet connection.  Its multi-language support also makes it a great option for international users. Currently, Copyleaks supports English, Spanish, French, German, Italian, and Portuguese.

In addition to these advantages, Copyleaks is also competitively priced and allows access to its API so that it can be integrated into a wide range of systems including academic learning management systems like Canvas, Moodle, and Blackboard. In addition, it can also help businesses prevent copyright infringement by checking for instances of their content elsewhere on the web.

Limitations of Using Copyleaks’ Plagiarism Checker

Although Copyleaks’ plagiarism checker has several things going for it, there are also several drawbacks to keep in mind. First and foremost is the cost. Although there is a free version available, in order to access the more useful features, you’ll need to pay.

Payment is either monthly or annually and varies depending on the number of documents you want to check. This can put it out of the range of affordability for many students who could use its features to avoid instances of academic plagiarism.

In addition to the cost, privacy, and security are another concern. Because documents are uploaded to the cloud, they are essentially stored on a third-party server while they’re being checked. Although Copyleaks does take steps to safeguard user data, some users may prefer to have a local plagiarism checker tool that doesn’t store their content.

How Does Copyleaks Plagiarism Checker Compare To…

Wondering how Copyleaks compares to other well-known plagiarism checkers? Let’s take a closer look:


Both Copyleaks and Turnitin use advanced algorithms to offer a more precise and flexible plagiarism scan, however, Copyleaks uses AI and advanced technology like NLP and machine learning to consistently improve, particularly in “fuzzy” areas of plagiarism detection like paraphrasing.

Copyleaks also supports a more varied list of document formats whereas Turnitin only supports a handful of formats. Beyond document formats, Copyleaks also supports multiple languages (and can scan the same document in multiple languages if desired). Turnitin requires you to submit the document in each language separately which can take a great deal of time.

Lastly, in terms of pricing, Copyleaks is much more affordable than Turnitin, which is geared towards high schools, colleges, and universities and is priced accordingly.


Copyscape most notably only allows for users to check if their content has been copied on the web by entering a URL. It does not scan for content duplication or plagiarism by copying and pasting nor by uploading documents, which Copyleaks does. Copyleaks also offers several integrations with learning management systems as well as WordPress, which Copyscape does not.

As a result of only scanning for pages on the web, Copyscape’s reporting is much simpler than Copyleaks and only covers a fraction of the many different types of plagiarism out there.


In addition, unlike other third-party tools, Originality.AI uses end-to-end encryption to keep your data safe, deleting all content submitted within 24 hours.

Originality.AI users have the option to check for AI-written content, plagiarism, or both simultaneously. Originality.AI also integrates with many AI services including ChatGPT 3 and 4 and OpenAI.

How Does Originality.AI’s Algorithm Work?

Originality.AI is trained on a very large database of content, some of which is written by humans and some by AI, this allows it to understand and identify AI-written content as well as plagiarism. Through the use of its pre-trained language model that is consistently being improved upon and developed, Originality.AI’s algorithm can identify even the more nuanced shades of plagiarism in a document.

Once Originality.AI’s scan is complete, it generates an easy-to-read report which details your document’s similarity score from 0-100. The higher the number, the more likely it is that it’s plagiarized from another source. Fortunately, like other tools, you can identify the source and take steps to correct the document on a case-by-case basis.

Should You Use Copyleaks?

If you’re looking for a plagiarism checker that integrates with the most popular LMS programs used by academic institutions, and you want to run a deep dive to check for plagiarism on documents sparingly, then Copyleaks could be a good option. However, given its cost, frequent use or use beyond academics could quickly eat up your budget.

Originality.AI offers both plagiarism and AI-detection checking in one complete service. With scans costing as little as 1 cent per 100 words, it’s an affordable way to scan not only for plagiarized content but also content that has been written by AI.

Beyond its use as a plagiarism and AI detector, Originality.AI is geared toward content professionals including website buyers, content publishers and writers who, given the proliferation of AI, want to make sure their work is authentically human and, in the eyes of Google and other search engines, exudes experience, expertise, authority and trust, the crucial traits that help a site to rank and rank well.

The best part is you can try Originality.AI directly online. Scan any website, email, Google Doc, or even WordPress post with the Originality.AI Chrome extension. Never again wonder if the content you’re reading or buying was made with AI. By using Originality.AI, you’ll now have a greater degree of certainty. Try it now!

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Sherice Jacob

Plagiarism Expert Sherice Jacob brings over 20 years of experience to digital marketing as a copywriter and content creator. With a finger on the pulse of AI and its developments, she works extensively with to help businesses and publishers get the best returns from their Content.

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