About Copyleaks

Copyleaks Plagiarism Checker is a web-based plagiarism detection tool for universities, students, publishers, agencies, bloggers and other organizations that require unique content creation. The tool is available for free for up to 20 scans per month and a paid version is available for higher volumes.

Using artificial intelligence (AI) powered algorithms, Copyleaks can detect plagiarism, similar text and paraphrased content within a document or text. The platform compares uploaded content to billions of sources across the web and provides a report to users detailing any plagiarized text or similarities. Sources include online content, licensed private databases, academic journals and private archives.

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Supported Operating System(s):

Web browser (OS agnostic)

79 Reviews of Copyleaks

Average User Ratings

Overall

4.59 / 5 stars

Ease-of-use

4.5

Value for money

4.5

Customer support

4.5

Functionality

4.5

Ratings Snapshot

5 stars

(51)

51

4 stars

(24)

24

3 stars

(4)

4

2 stars

(0)

0

1 stars

(0)

0

Likelihood to Recommend

Not likely

Very likely

Showing 1 - 5 of 79 results

January 2020

User Profile Picture

Ian Mateo from Instituto Tecnológico de Sonora

Verified Reviewer

Company Size: 1,001-5,000 employees

Industry: Higher Education

Time Used: Less than 12 months

Review Source: Capterra


Ease-of-use

5.0

Value for money

4.0

Functionality

4.0

January 2020

Best alternative to Ithenticate

I started using it because my organization stopped paying for another similar service. In the beginning, I didn't understand well how the credits where used. However, it works really well in the end. I used it mainly to check essays of students in English and Spanish.

Pros

Easy of use, fast and intuitive interface. It is easy to send results to students.

Cons

The use of credits depending on the number of words is confusing.

Reasons for Switching to Copyleaks

My organization stoped paying the previous service.

January 2020

David from KOBIL Systems GmbH

Company Size: 51-200 employees

Industry: Computer Software

Time Used: Less than 6 months

Review Source: Capterra


Ease-of-use

5.0

Value for money

5.0

Functionality

5.0

January 2020

One of the best plagiarism checkers out there

Pros

I've used Copyleaks while writing my master thesis and it has been an excellent experience. Everything from signing up, payments and the actual literature comparison process worked as expected. Having an AI checker in addition to traditional text cross-referencing definitely helped me to feel more confident with the results and in the end my thesis passed all reviews at the university. Copyleaks supports the important and usual file types and does a very good job in parsing PDF files, which, in my opinion, is the most important feature. In my case, I analyzed a PDF generated from LaTeX, and I was happy with the results.

Cons

At times, viewing the analysis results was a bit laggy on my quite powerful machine, which might be due to having a quite large document or due to the browser itself. Another thing was that sometimes it seemed slightly finicky with whitespace handling. Sometimes it reported very short fragments of general language as plagiarized. I do, however, prefer a higher false positive rate over possibly missed hits.

Reasons for Switching to Copyleaks

The Grammarly plagiarism checker didn't seem to handle large documents very well and was laggy. My document was so large that I had to split it into 2 parts to be able to even get it analyzed.

August 2019

Michal from SEOlight s.r.o.

Company Size: 2-10 employees

Industry: Marketing and Advertising

Time Used: Less than 2 years

Review Source: Capterra


Ease-of-use

5.0

Value for money

3.0

Customer support

5.0

Functionality

3.0

August 2019

Copyleaks review

Pros

It is simple to use. It includes API. Support is always fast and helpful. We get individual pricing plan for our needs, which is not standard for other software.

Cons

There were some issues with wrong duplicity results and insufficient website indexing. It was addressed and dealt with, but it happened a few times.

May 2021

Joe from Travelling Politico

Company Size: 1 employee

Industry: Public Relations and Communications

Time Used: Less than 12 months

Review Source: Capterra


Ease-of-use

5.0

Value for money

5.0

Functionality

5.0

May 2021

The best plagiarism checker available

I commission articles from writers on a regular basis. This means that I cannot be too careful with the authenticity of work that I receive. I use Copyleaks to check for plagiarism and have found it very effective, low cost to implement, and easy to use.

Pros

Using artificial intelligence, I am able to detect plagiarism quickly and effectively with no hassle. I like that the software can check all types of document types (including PDF), flags up content already published online, and that I can scan multiple documents side by side to ensure that any writing submitted to me is not plagiarised.

Cons

The only issue I have experienced when using Copyleaks is that the use of credits depending on the number of words being checked. This makes it difficult to understand how much checking each document will cost.

August 2019

User Profile Picture

Shao from miaowrite.com

Verified Reviewer

Company Size: 2-10 employees

Industry: Writing and Editing

Time Used: Less than 12 months

Review Source: Capterra


Ease-of-use

5.0

Value for money

4.0

Customer support

5.0

Functionality

4.0

August 2019

A good service on plagiarism

Pros

This software can provide plagiarism service, with high quality, for multiple languages other than English.

Cons

The API response is a bit slow. I understand it costs computer resources for plagiarism operation, but obviously it would be better if we can get several initial result within seconds.