Copyleaks Plagiarism Checker Review:
based on real mystery shopping

A*Help Score: 86/100
🔥 published August 3, 2023 - updated June 3, 2024

Copyleaks was founded back in 2015 and since then it has grown into a service recognized by numerous educational institutions. Now, it offers solutions that help ensure authenticity and originality of written works. We tried out its plagiarism checker and AI detection feature and can say that it’s generally a convenient solution for text analysis and integrity evaluation.

TOP services Our verdict AHelp Score 🔥 Updated January 2024
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AHelp Plagcheck
Best plagiarism detector 86.5/100 Get free access
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Best experience 86/100 Read review
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Best features 85.1/100 Read review
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Originality AI
Best free trial value 79.1/100 Read review
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Best price 78.6/100 Read review


🌟 A*Help score86/10065/100
✅ Detection Quality44/5030/50
💲 Price$10.99$10.99

Copyleak’s plagiarism detection tool was simple to navigate and had a free usage option. It provided a high level of accuracy when finding stolen content but couldn’t detect AI-paraphrased bits. The AI checking feature presented a great array of possible tech detection that ranged from tracing down GPT 3.5 to Bard. Despite not being most customer-oriented in usability due to no customer support, it showed a valid analysis of AI-generated content.
⚖️ Our verdict⭐⭐⭐⭐
Works great for academic texts that need proof of originality.
Copyleaks is a valuable tool capable of detecting AI created text in different pieces of writing. 
Copyleaks' Plagiarism Detector

Copyleaks Plagiarism Detector – Quick Overview

Copyleaks is a versatile tool that is set out to be the best plagiarism checker, detecting plagiarism and AI-generated content in content and written papers. Its great range of basic and advanced features can come in handy for students and educators alike. Not to mention the accuracy of the plagiarism detection quality Copyleaks gives its users. See How We Test Plagiarism Checkers for more details about our testing approach.

The Good
  • Excellent selection of free features
  • Has advanced option for cross-language search
  • Can analyze content in various sources
The Bad
  • AI-generated text cannot be identified
  • Lack of browser extension
An infographic with a short Copyleaks review describing the ways it was tested and how it received an A*Help Score: 86/100

Imagine you find someone else’s work and try to pass it off as your own—that’s plagiarism. It’s usually more about breaking the rules of fair play in school or work than breaking the law. But be careful, because if you use plagiarism to trick someone for your gain, you might be stepping into illegal territory. In universities, if your paper is marked as plagiarized, you, of course, won’t hear feds banging up your door or “that’s the sound of the police” in the background. Still, it may lead to an exclusion from the university.

That’s why finding a quality plagiarism detection matters. Both for you as a student and your professors. A good program of that kind works like a fast detective tracing down the signs of copied content. Some platforms may even help with finding AI generated stuff or text that was simply rephrased. One famous example of the software that presumably does all that is Copyleaks. The service has become well-known and widely-used among educational institutions and professionals. Following its reputation, we decided it would be only fair to test its detection abilities. Now, you can see whether you should trust Copyleaks for yourselves. 

Trying plagiarism detection with Copyleaks
Trying plagiarism detection with Copyleaks (click to see a bigger image)

Copyleaks Mystery Shopping: How We Tested the Plagiarism Detection Service

Our team tries to work as true detectives: we trace down each step of the customer journey, play out the possible scenarios, and do everything to get all the evidence needed to paint the big picture about the service we review. 

Our mystery shopping is organized so that we can evaluate three main criteria of the service: value for money, overall experience, and plagiarism detection quality. To satisfy both your interest and ours, we focus on the features offered by the service and its pricing, as well as the convenience and usability of the website. 

The main part of our research, however, is the testing of the plagiarism detection quality. To review all the aspects of the process and include all the possibilities, we included 5 texts in our scenario all dedicated to the discussion of characteristics of a leader:

StatusExpected Results
✍️ Written from scratch
🔍 Found online & submitted
🤖 ChatGPT-paraphrased
🤖 Quillbot-parapharsed
🔠 Online text with interchanged letters❌ / ⚠️

This way we wanted to test how well the particular plagiarism detector would do its work and prove originality/plagiarism both when there’s a 100% certainty and when the text was meddled with. See How We Test Plagiarism Checkers for more details about our testing approach.

In the end, we put all the pieces together and determine the A*Help score of the service, which reflects its quality and usefulness for plagiarism detection purposes. Copyleaks was tested the same way. 

Copyleaks’ Plagiarism Detection Quality — 44/50⭐️⭐️⭐️⭐️

The key feature that makes a plagiarism detector successful is the accurate recognition of copied and stolen pieces of text. At least that was what we were looking for when testing Copyleak’s detection abilities. 

As was mentioned above, we had 5 different pieces of writing. Each one of these writings went through Copyleak’s plagiarism detector. Below we will discuss the results of this process.

So, the first text, which was 100% human-written, was marked as 92.6% plagiarism-free. This result proves that Copyleaks does a good job of detecting original content. This is also a sign that you can rest assured that if you write a paper yourself, you won’t be falsely accused of plagiarism.

1st text scan at Copyleaks
Human-written text scan at Copyleaks (click to see a larger picture)

The second writing was the one that we just found online. We didn’t reference or quote it but just passed it as our own. This paper, as we expected, was marked as 100% plagiarized. So, if you took somebody else’s text without rightful attribution, Copyleaks would faultlessly point that out as plagiarism.

2nd text scan at Copyleaks
Internet sample scan at Copyleaks (click to see a larger picture)

That’s why we moved on to more intricate examples. Copyleaks was great at detecting unoriginal content in 2 AI-paraphrased papers. It marked the two writing as being 80.35% plagiarized which makes sense since we just took it from the Internet and rephrased it. Remember, simple rewriting doesn’t bring any novelty to the paper and such phrases still need to be cited and referenced. 

3d text scan at Copyleaks
AI-paraphrased text scan at Copyleaks (click to see a larger picture)

What about the last text? It was the sneakiest piece of writing, as we took it from the Inetrnet and rephrased using an AI. Unfortunately, Copyleaks didn’t handle such a level of trickery and marked the text taken from the Internet as 100% original content. This led us to believe that the service can’t yet identify AI interventions in writing. 

In the end, Copyleaks generally did great at detecting plagiarism and original pieces of writing and even battled AI paraphrasing! Despite not tracking down the letter-manipulations we did with the last piece, this tool presented a high-quality plagiarism detection. 

> Text> Best result> Acceptable result> Copyleaks result
Human-written text100% free of plagiarism10% margin of error92.6% free
Internet sample100% plagiarism detected10% margin of error100% detected
AI paraphrase (2 texts)100% free of plagiarism10% margin of error80.35% plagiarism detected
Replaced characters100% plagiarism detectedFlagged character replacements0% detected

Copyleaks’ Plagiarism Detector: Value for Money — 21/25⭐️⭐️⭐️⭐️

We get that the main thing you are looking for is a tool for plagiarism detection. Honestly though, would you rather choose a website that just spots copied texts, or one that also provides opportunities for AI detection, citation proofreading, etc.? As we see it, it’s always better to have a service that meets the variety of your needs.

Copyleaks can proudly say that it is the platform of that kind. When we searched through the platform, we noted that it offered a bunch of features for text checking. It could analyze  files, as well as text from URL links, and provided an opportunity to do an academic type of proofreading. This was particularly helpful since our works included references which needed to be properly cited and formatted. 

What made the platform stand out even more in our eyes was the variety of extra services. Need AI detection? You can do it with Copyleaks. Trying to establish if the work was translated from another language? It will do a cross-language search for you. Need to compare the paper with some other to see if they are similar? No need to go anywhere – Copyleaks will handle that for you.  It even has an option to extract text from images which is most helpful when you have a photo of your lecture notes and need to use them for a presentation, for example. 

As for the sources it can detect, it covers all the possible ones. As we checked, it can find references from the Internet, identify them from the documents you uploaded, and also uses its own database to define references. 

We were pleasantly surprised when we figured that Copyleaks allowed us to try all these features completely free. There was a limit of 10 pages as well as a word limit per one detection but that was more than enough to check our papers. Of course, the platform had a paid plan but it was rather cheap as well – only $10.99/month with a 100-page limit. And if that doesn’t fit into your budget, the platform also offers discounts to make the pricing more pleasant.

Copyleaks showed that it is worth its price, providing a variety of helpful features that can help both students and professors more than just with plagiarism detection.

Basic features
Price & special offers

Copyleaks Plagiarism Detector’s Overall Experience — 21/25⭐️⭐️⭐️⭐️

Now, since plagiarism detectors are mostly online tools, they need to be convenient. A lot of aspects contribute to higher usability, such as opportunities to install app extensions, support, and registration. Mostly, Copyleaks showed that it is practical and simple in use. 

Copyleaks' main page
Copyleaks’ main page (click to see a larger picture)

The website was very intuitive which allowed us to quickly navigate through the features and the detection process itself. We were also able to try it before registering, so we knew what we were signing up for. The creation of a profile itself was also quick and easy and allowed to use our Google or Facebook accounts to register. Was there a browser extension so we could check papers in google docs or on websites? No. Nonetheless, since the process of plagiarism detection on the platform didn’t take more than a couple of seconds, it wasn’t such a big of an inconvenience. 

One of the reasons why Copyleaks was so easy to use was its support system. When we entered the platform we were met with a brief onboarding on how to work with it. There were guides that explained the basic features and covered possible questions. We also noticed that there was a support contact form in case of any possible issues with the service. All of this definitely contributed to our feeling of confidence during interaction with the plagiarism detector. 

The organization of the payment system is also very important. Copyleaks recognizes that. That’s why, if you decide to purchase a plan here, you will be provided with a bunch of purchasing opportunities varying from wallet payments to card ones.

All in all, Copyleaks was not only useful but also usable (pun intended). If we stumbled upon it when searching the Internet, there would hardly be a chance that we would leave looking for other options.

User experience & registration

The Verdict

What’s the main take? Copyleaks is a convenient and affordable tool for plagiarism detection. Here you will find a variety of features such as citation checking, AI content detection, and even text comparison, that may be helpful throughout your academic writing journey. Does it provide a faultless plagiarism recognition? 9 out of 10 times – yes. In general, if you are a student, wanting to check the paper for plagiarism beforehand, Copyleaks will help do that. And, if you are a teacher, who wants to find out whether somebody copied text online or even rephrased it, this tool will certainly prove to be right for you. After all, if you don’t have to overcome the sleekest cheating schemes of all times, Copyleaks will do its job and do it well. 

Copyleaks’ Plagiarism Detector Specs

> Features
Check files
Insert text
Receive report
Word limit
Academic proofreading module (check citations and etc)
Check for free/trial
Number of free checks availableup to 1500-2000
Spelling check
Grammar check
> Advanced features
Detect AI content
Cross language search
Text compare
OCR scan
> Sources
Current Batch Files (your own docs)
Plagchecker’s database
> Price & special offers
Paid plansCheap
> Accessibility
Easy to use website
Desktop version
Trying before registration
Browser extensions
Account (do users have an account?)
Time to check worka couple of seconds
Need email to register
Need phone to register
Third-party registration methods
> Support
Onboarding (how to use plagcheck)
Support chat
> Payment
Wallets (ApplePay, GooglePay, Paypal)

CopyLeaks AI Detector

Using Copyleak's AI detector
Using Copyleak’s AI detector (click to see a bigger image)

Quick Overview

Copyleaks AI Detector presents a commendable solution for identifying AI-generated content, achieving an A*help score of 65 out of 100. The tool exhibits a strong performance in detecting both fully AI-generated and paraphrased texts, scoring 3 out of 5 and 5 out of 5 respectively. However, it excels in recognizing human-written content, with a perfect score of 10 out of 10. Despite its strengths, the overall experience could be improved, particularly in terms of support options and clarity of results.

The Good
  • Free version
  • A great number a features
  • Various subscription plans
The Bad
  • Lack of support options
  • No MS Word integration

CopyLeaks’ AI Detection Accuracy — 30/50⭐️⭐️⭐️

Copyleaks AI Detector showed us admirable accuracy in identifying AI-generated content. It successfully detected AI involvement in both fully generated and 50% paraphrased texts, scoring 3 and 5 points respectively. Additionally, it showcased its prowess in distinguishing human-written content, achieving a perfect score of 10 points. Thus, we can firmly say that yhe tool’s overall detection quality is notable, especially in recognizing the nuances between different types of content.

Detection results at Copyleaks AI detector
Detection results at CopyLeaks (click to see a large image)

AI Detection Results: 18/30

Human-writtenAI-Generated  Paraphrased
Score⭐️⭐️⭐️⭐️⭐️ (10)⭐️⭐️ (3)⭐️⭐️⭐️(5)
Detection feedbackNo AI detectedAI text detected: we were unable to verify that the text was written by a humanAI text detected: we were unable to verify that the text was written by a human

CopyLeaks AI Detector’s Value for Money — 22/25⭐️⭐️⭐️⭐️

Copyleaks AI Detector offers good value for money, with a score of 22 out of 25. We were especially pleased to see that it provides a free trial with a 2500-word limit and various pricing plans based on the number of pages per month. Although there are no discounts available, the pricing is competitive, and the tool accepts multiple payment methods including Visa, MasterCard, Discover, and American Express.

Tech detection
Available tools
Input sources

CopyLeaks’ AI Detector & Overall Experience — 13/25⭐️⭐️⭐️

We had a mixed feelings about Copyleaks’ usability when working with it. Registration was straightforward, with third-party sign-in options available, and no phone number required. The website was also aesthetically pleasing and easy to navigate, supporting 12 languages and offering printable reports. However, the clarity of results could be improved, and the support options were limited, lacking instant chat, phone support, and social media channels.

Dashboard at Copy Leaks
Dashboard at CopyLeaks (click to see a large image)
Website experience


Overall, Copyleaks AI Detector is a reliable tool for detecting AI-generated content, with strong accuracy and a range of input options. While it offers good value for money and a user-friendly website, the overall experience could be enhanced by improving support options and result clarity. It is a suitable choice for those seeking a dependable AI detector, particularly in educational settings.

CopyLeaks’ AI Detector Specs

Human + AI
Trusted in education
API integration
Browser extension (Chrome)
MS Word
Addit. on-board tools
files (pdf, word)
simple text (copy-paste)
Code files
Batch files upload
Free trial
Limitsaround 1200 words (5 credits)
Third-party sign in options
Needs phone number
Personal account
Aesthetic Interface
Quick process
Multi-language detection
Printable report
Clear results
Leave a message
Instant chat
Social media channels
FAQ and guides


Copyleaks Reviews

The AcademicHelp team understands the importance of working with trusted services, websites, and applications. So, before we are ready to recommend a tool to our readers, we do personal research online. Our experts go through users’ reviews on sites like TrustPilot,, Sitejabber, and Reddit to find real feedback and unbiased opinions. All these insights serve as a foundation for our mystery shopping.

Is Copyleaks a Scam?

Having tested Copyleaks and scanned 5 different texts through this plagiarism checker, we can claim that this service is not a scam. Any user can quickly figure out how this tool works. Plus, Copyleaks does not take long to scan texts. In the long run, we received results and reports for every essay they checked with this service. 

Is Copyleaks Legit?

Yes, Copyleaks is a legitimate plagiarism detector. During our mystery shopping experiment, we did not notice any fishy activity from the service. Hence, AcademicHelp is positive that this tool is legit.

Is Copyleaks Safe?

Our team of experts used Copyleaks to scan 5 different essays. Additionally, we registered on the site. In this regard, we can prove that this plagiarism scanner is safe and secure. When paying for the tool to check our essays, and creating an account we did not notice any fraudulent activities. 

Is Copyleaks Trustworthy?

Yes, Copyleaks is a trustworthy website for students who wish to check their written works for plagiarism. Established in 2015, this tool has gained a great share of devoted users who consult Copyleaks on a regular basis. And based on our mystery shopping experiment AcademicHelp can guarantee that this is a reliable service.

Is Copyleaks a Good Service?

We tested Copyleaks through 5 different essays. The overall mark that we granted this service is 86 out of 100 points. We included in the final score not only the general plagiarism detection quality but also the value for money aspect and overall experience. 

Follow us on Reddit for more insights and updates.

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