Copyleaks Reviews – How Accurate is Copyleaks AI and Plagiarism Detector

Tim Daws

Tim Daws

Sep 26, 2024

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AI content generation is convenient in saving time, money, and resources. However, misinformed, inaccurate, and error-prone content is like deceiving the reader. For this reason, Google rolled out an update that encouraged bloggers and content creators to publish well-researched and easy-to-read articles for past indexing on SERP.

So, how do these search engines find out that the published content is AI-written? 

It is through specific detection models that AI is spotted with precision. Individuals can also look for traces of AI using tools like Copyleaks before adding articles or blogs to their websites. 

But are these tools accurate? 

Find out in our detailed Copyleaks review.

Copyleaks reviews

In This Article
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Part 1: Problems from Real Users of Copyleaks AI Detector

Real customers have experienced several issues while scanning their content via Copyleaks. One prominent concern was that it did not indicate what percentage of the text was AI-generated. Moreover, removing even a single word from the article or essay triggered AI detection upon re-scan. 

Why is this the case? We have the answer here.

1.1 Why do Copyleaks detect everything as AI?

Students and bloggers with non-native backgrounds often use Grammarly and other suggestive AI tools to polish their content. This was the norm before the inception of AI content generators like ChatGPT. 

However, now AI detection tools like Copyleaks sweep all traces of AI under the same rug. It doesn’t discriminate. So, if even a tiny amount of editing is done using Grammarly, then your content will likely be considered AI.

One user had this to say about this tool and why it always detects content as AI.

“Copyleaks lacks reliability and should not be marketed as an “AI” detector. When a story summary exhibits close similarities, Copyleaks erroneously labels it as “AI,” whereas it more accurately falls within the realm of unintentional plagiarism. Claiming to be “reliable” and “trustworthy” is deceptive advertising, misrepresenting the tool’s true capabilities and accuracy.”

1.2 What is a good Copyleaks score?

Anything above 75% is considered a good AI score. It indicates that a small portion of the content is adjusted via Grammarly or similar adjustment tools and that about a third of the text is completely written by a human. 

Part 2: A Comprehensive Understanding of Copyleaks AI Detector & Plagiarism Checker

Before jumping to the accuracy part of the tool, it is vital to understand what Copyleaks is and what it has to offer. 

2.1 What is Copyleaks?

Copyleaks is an AI authentication tool that checks plagiarism and traces of AI in content. It is a comprehensive suite of tools that ensure that your content is original and error-free. The tool offers free access to features on a limited scale once you create an account. 

2.2 Main Functions of Copyleaks

Copyleaks is a multifunctional tool that ensures your content, whether it be text or code, is authentic and error-free. Here are the features accessible on the platform.

AI Detector Function of Copyleaks

As the name suggests, this feature checks traces of AI writing in a text. The free version only highlights the AI content and gives its verdict on whether the passage is human-written or not. If you want a thorough score or result, a subscription is necessary.

Plagiarism Checker Function of Copyleaks

This feature helps check if the content is copied or not. It can identify plagiarism across several languages. However, it is not available for free. You can request a demo by providing some information to Copyleaks.

Codeleaks

Since the inception of AI-generative services, software engineers have effectively created code for their projects to save time. However, overreliance can cause licensing issues. This is where this feature comes in handy. With it, you can detect AI-generated code and flag it for plagiarism. It is also unavailable for free.

Writing Assistant

With it, you can generate content that is error-free and in your preferred tone. Moreover, the text will avoid any AI detection, saving time and resources. 

2.3 How Does Copyleaks Work?

The Copyleaks model is extensively trained using countless texts that have allowed it to understand human writing patterns and what separates it from something written by an AI tool.

Similarly, the plagiarism detector scans through a vast database of articles, academic papers, and websites to verify if the entered text is original.

Part 3: How Reliable is Copyleaks AI Detector & Plagiarism Checker?

Is Copyleaks reliable? They definitely claim to be. Here, we have reviewed their self-assessment and what the old users of the service have to say.

3.1 What is Copyleaks’s Self-Assessment?

Copyleaks claims that it is the perfect AI-powered solution to bring authenticity to your text and code. It offers features that can help with plagiarism and AI due to extensive training by scanning trillions of content. 

The tool also states that it can check traces of AI in content generated by the latest GPT4o model. On the website, it claims an accuracy of 99%, which may seem a tad exaggerated.

3.2 What are The Evaluations of Copyleaks on Third-Party Review Platforms?

Copyleaks underperformed on Trustpilot; about 42% of the 191 reviews had only a 1-star rating. The average score was 3.4, an underwhelming indicator that it isn’t a reliable service. 

One user was frustrated with the AI result.

“I just spent one minute and 46 seconds going into this site and writing this review. I should say time well spent because this just CopyLeaks just sucks. I’m probably gonna sue for false advertisement, them stating that it’s 99% accurate, it’s not. I got an AI detection once in my essay, which I know that I didn’t use AI for. I fiddled around a little with the text, and with that, I mean removing a sentence, I apparently got cleared for any AI.”

Another customer suggested that students and teachers stay away from this tool.

“This tool is incorrect 99% of the time. First, it gives you accurate detection for a few times. Then, it flags your content as AI all the time. The same texts got different AI detection results. Dear Copyleaks, don’t you understand that false AI detection can impact a lot of important things, from work to study? Please stop your unethical way of doing business. Just tell customers to pay from the start; don’t give free credits just to make false detection and scam us into paying.”

The positive reviews were not detailed enough. Most only wrote how excellent the service was, and none gave the reason behind the nod of approval. On other review sites like Capterra and GetApp, Copyleaks had a better score of 4.4, where users praised that it was easy to use and offered cost-effective plans.

One user had this to say.

“Copyleaks has been crucial for allowing me to grade not only with blatant plagiarism in mind but also with revision in mind! I use Copyleaks to check for both plagiarism and the amount of change my students make from one iteration of a paper to the next. Both have been invaluable to me as an educator in the writing field! Without this service, my grading would take considerably longer, so I am grateful to Copyleaks for having the necessary tools.”

Part 4: Seeing is Believing - Let’s Check How Accurate Copyleaks is!

User reviews can influence your decision, but we decided to test the service for ourselves to check if it can accurately detect AI in your content. 

4.1 Success Rate of Copyleaks 

First, we scanned an AI-generated essay on World History on Copyleaks. It detected and highlighted AI content in all of the entered text. In this regard, Copyleaks was completely accurate:

AI Score : AI content was detected by Copyleaks.

Copyleaks AI content-score

Next, we scanned an article written by our staff without any influence of Grammarly or other AI tools. No trace of AI was spotted by Copyleaks, and we got a nod of approval from its AI detector. 

AI Score : The text was human-written.

Copyleaks human written content-score

4.2 Copyleaks Comparison with Other Tools

Are other tools as accurate as Copyleaks? We scanned both the AI-generated text and human-written article using the following tools to compare the results. Check them out!

Copyleaks vs ZeroGPT

You can use GPTZero for free to check for AI in the content. It supports up to 15,000 characters in the free plan. The Pro package starts at $9.99 per month, and with it, you can scan up to 100,000 characters. 

We scanned the same content written by a human(our staff member) on this platform and received a positive score of only 1.06%, meaning the text was original.

AI Score of ZeroGPT for AI-Generated Content : 1.06% of the text was AI.

ZeroGPT human content score

The tool detected AI in almost all of the content, ensuring it was accurate.

AI Score of Turnitin for Human-Written Content : 99.46% of the text was AI.

ZeroGPT AI content score

Here is the comparison table.

Tools ZeroGPT ZeroGPT
AI Detection Score in Human-Written Content 0% 1.06%
AI Detection Score in AI-Written Content 100% 99.46%

Copyleaks vs Turnitin

Turnitin is the preferred AI and plagiarism detector for academics and students, ensuring their content is original. In our case, the tool accurately declared the article to be human-written.

AI Score of Turnitin for Human-Written Content : 0 of the text was AI%

Turnitin human content score

The tool detected AI in almost all of the content, ensuring it was accurate.

AI Score of Turnitin for AI-Generated Content : 100% of the text was AI.

Turnitin AI content score

Here is the comparison table.

Tools Copyleaks Turnitin
AI Detection Score in Human-Written Content 0% 0%
AI Detection Score in AI-Written Content 100% 100%

Copyleaks vs GPTZero

GPTZero offers its services at $15 per month via the Essential package. The Premium plan is available at $24, and the Professional plan comes at $35 per month. 

Moreover, you can scan content up to 5,000 characters for free. Still, this package is insufficient to detect AI in a whole essay or article. The human-written content we scanned on the platform only detected 2% AI, which was a positive result.

AI Score of GPTZero for Human-Written Content : 2% of the text was AI-written.

GPTZero human content score

We also scanned an article written by ChatGPT on GPTZero and got a 100% AI score, compared to ZeroGPT, which gave the same content a 99.08% AI rating.

AI Score of GPTZero for AI-Generated Content : The entire content was 100% AI-written.

GPTZero AI written score

Check out the following table for a quick overview of the results.

Tools ZeroGPT Turnitin
AI Detection Score in Human-Written Content 0% 2%
AI Detection Score in AI-Written Content 100% 100%

Copyleaks vs WRITER

You can scan 5,000 words for free without creating an account on WRITER. It is easy to use and cost-effective.

AI Score for WRITER for Human Content : It detected only 3% AI in our passage.

WRITER human content score

However, the AI content was inaccurate. Instead of detecting the majority of text as AI, it only detected 32%.

AI Score for WRITER for AI-Generated Content : The content had an inaccurate score of 32% AI.

WRITER AI content score

Check out the following table.

Tools Copyleaks WRITER
AI Detection Score in Human-Written Content 0% 3%
AI Detection Score in AI-Written Content 100% 32%

Copyleaks vs Sapling

Sapling detected AI in our human-written passage, which was crafted from scratch without the influence of Grammarly or other AI tools. 

AI Score for Sapling for Human Content : The tool detected 25.1% AI.

Sapling human content score

The detection in this scenario was accurate as the AI content did not get past Sapling’s detector.

AI Score for Sapling for AI-Generated Content : The content was 100% AI.

Sapling AI content score

Here is the table to check the output scores.

Tools Copyleaks Sapling
AI Detection Score in Human-Written Content 0% 25.1%
AI Detection Score in AI-Written Content 100% 100%

Copyleaks vs Content at Scale

You can scan only 2,500 characters for free on Content at Scale. However, it is fairly accurate, and the pricing plans are not too expensive. It passed our human-written content and spotted no traces of AI.

AI Score for Content at Scale for Human Content : The content was passed as Human-Written.

Content at Scale human content score

Content at Scale spotted AI in the ChatGPT content accurately.

AI Score for Content at Scale for AI-Generated Content : The content got flagged as AI-written.

Content at Scale AI content score

Check out the following table.

Tools ZeroGPT Content at Scale
AI Detection Score in Human-Written Content 0% Original
AI Detection Score in AI-Written Content 100% AI Content

Copyleaks vs Crossplag

Crossplag offers 10 credits upon creating a free account that can scan up to 1,000 words. However, according to our results, this tool is not worth the purchase as it falsely detected AI in our human-written content.

AI Score for Crossplag for Human Content : The tool spotted 100% AI.

Crossplag human content score

However, in ChatGPT’s content case, the tool was accurate.

AI Score for Crossplag for AI-Generated Content : The content was 100% AI.

Crossplag AI content score

Here is the comparison table.

Tools ZeroGPT Crossplag
AI Detection Score in Human-Written Content 0% 100%
AI Detection Score in AI-Written Content 100% 100%

Copyleaks vs Originality AI

This tool is advanced and extremely accurate. Even a slight preposition adjustment via Grammarly can not bypass it. We tested this claim and got the results according to them. 

AI Score for Originality for Human Content : There was no AI in our content according to Originality.

Originality human content score

Originality accurately predicted AI in all of the content.

AI Score for Originality for AI-Generated Content : The content was 100% AI.

Originality AI content score

Check out the table.

Tools ZeroGPT Originality
AI Detection Score in Human-Written Content 0% 0%
AI Detection Score in AI-Written Content 100% 100%

Part 5: Testing Plagiarism Detection Function of Copyleaks

Now that we know that Copyleaks AI detector is accurate and quite useful, the next step is verifying the accuracy of its plagiarism detection feature. Follow this section to learn the results and our findings.

5.1 The Results of Copyleaks’ Plagiarism Detection Tool

Copyleaks plagiarism detection tool is not accessible for free. If you run a business or represent an educational institute, then you can request a demo. However, you must use a business email address for that. 

The feature alone is accessible at $10.99 per month. You can check alternative tools to test plagiarism, and we have tested their efficacy in this section. Read on! 

5.2 Result Comparison with Other Alternatives

Are other plagiarism detection tools as accurate as Copyleaks? We tested the top ones here.

Grammarly Plagiarism Checker

We published our article on a third-party website and scanned the text to see if Grammarly could spot it. Indeed it did! The tool not only shared the link for the post but also provided how much of the text was plagiarized.

Plagiarism Score by Grammarly : The score was 62%.

Grammarly plagiarism detector

Plagiarism Checker (https://plagiarismdetector.net/)

This tool can scan 1000 words of content for free. We checked the same article to see if it could spot plagiarism, and after a few minutes, it gave an 82% unique score, which was inaccurate.

Plagiarism Score by Plagiarism Detector : The score was 18%.

plagiarism detector score

Quetext Plagiarism Checker

This tool allows checking up to 500 words for free for plagiarism. It detected 53% copying in the text and also shared the link where the article was published. Given the limited word count, we had to scan, this score was accurate.

Plagiarism Score by Quetext : The score was 53%.

Quetext plagiarism score

SmallSEOTools Plagiarism Detector

This tool also allows up to 1,000 words for free to verify if the text is plagiarized or not. We scanned the article and got affirmation from SmallSEOTools about where it was published.

Plagiarism Score by SmallSEOTools : The score was 53%.

SmallSEOTools plagiarism score

Duplichecker

This tool can also check 1,000 words for free. Though it did spot where the article was published, the score was inaccurate. It only detected 17% plagiarism.

Plagiarism Score by Quetext : The score was 83%.

Duplichecker plagiarism score

Part 6: How Much Does Copyleaks Cost?

Here is the table of the pricing plans of Copyleaks.

Plan Price Credits Features
AI + Plagiarism Detection $16.99/mo Up to 100
  • Detection across multiple languages 
  • Multiple forms of paraphrasing detection
  • Detection of AI models, including ChatGPT, Gemini, and Claude
  • Two users included
  • API Access
Plagiarism Detector $10.99/mo Up to 100
  • Multiple forms of paraphrasing detection
  • Detection of source code plagiarism
  • Cross-language detection
  • Two users included
  • API Access
AI Detector $9.99/mo Up to 100
  • Detection in over 30 languages, with more in the works
  • Detection of AI models, including ChatGPT, Gemini, and Claude
  • Two users included
  • API Access

Part 7: Other Commonly Queried Concerns about Copyleaks

Follow this section for additional information about Copyleaks and how to manage your account.

7.1 How to cancel Copyleaks subscription?

Just log in to your account, access the Billing section, and hit the cancellation tab to initiate the process. 

7.2 What is a Copyleaks report?

Copyleaks report is accessible to premium users. It displays additional information on the AI and plagiarism spotted in the entered text. 

7.3 Is Copyleaks as good as Turnitin?

Turnitin is a much more reliable and professional tool compared to Copyleaks.

7.4 Can Copyleaks be trusted?

According to our tests, Copyleaks offers accurate results and can be trusted. 

7.5 Is Copyleaks lying?

If there is an influence of tools like Grammarly, then it can trigger AI detection. However, the majority of the time, Copyleaks is accurate and isn’t lying.

7.6 Do teachers use Copyleaks?

Teachers mostly use Turnitin compared to Copyleaks.

Part 8: Advantages and disadvantages of Copyleaks AI Detector

Based on the features, testing, and analyses, these are the pros and cons of Copyleaks

Pros

Free AI Detection – You can scan your articles or essays to check for traces of AI. There is no word count limit. However, the tool won’t show a detailed report; it will only display the verdict and highlight the sections that might be AI-generated.

Accurate – Our testing proved that Copyleaks was accurate to a fault and did not indicate errors or other issues. 

Cons

Limited Feature Availablity With Free Plan – Accessories like plagiarism checker and other tools are not accessible with the Free plan. You are required to purchase the service.

Low Rating on Trustpilot – It hasn’t had the general public’s confidence on review sites; many customers have shared concerns about accuracy. 

Part 9: How to Avoid Copyleaks AI Detection?

If you are short of time and have AI-generated content to publish but do not wish to face any penalties, consequences, or AI detection, then there is a way to do it via a content humanizer tool like TextGo AI

This intuitive tool will polish your content and rewrite it, making it impossible for all advanced AI-detection tools like Copyleaks to spot anything. It is easy to use and allows up to 2,000 words in one go.

TextGo AI

9.1 Preparation Before Starting Bypassing Copyleaks AI Detection

Not much preparation is needed to avoid AI detection; we presume you will have content generated via a tool like ChatGPT. So, instead of scanning it directly via Copyleaks, we recommend humanizing it first via TextGo AI.

TRY IT FREE

9.2 What You Can Get from an Undetectable AI Content Generator

With an AI detection tool like TextGo AI, you can easily bypass all the top AI detection tools online. Your content won’t be flagged as AI, even if you have generated it via ChatGPT, Gemini, or similar platforms. 

Here is what TextGo AI has to offer.

  • Advanced modeling techniques for original and non-AI content.
  • Instant AI detection score for both input and output content.
  • Well-written and formatted content that ranks on search engines
  • No plagiarism in the output content

9.3 How to Use The Best Undetectable AI Content Generator?

TRY IT FREE

The steps are as follows.

Step 1.Add Input Text 

Go to the official TextGo AI website and enter your text. 

Add content to TextGo AI

Step 2.Humanize the Content

Click the HUMANIZE button and let TextGo AI start the processing. 

Humanize the AI content using TextGo AI

Step 3.Copy The Humanized Content

Once TextGo AI humanizes the text, click the Copy button to add the text to the clipboard so that you can publish it anywhere you want. 

Besides, you can scan the text on Copyleaks to verify if the content can bypass detection or not. Moreover, it is capable of avoiding AI detection from notable tools, including Turnitin, Originality, ZeroGPT, GPTZero, and more. 

You can also discover the AI score with TextGo’s instant AI detection feature. It is highly accurate compared to other notable tools.

Copy the humanized text using TextGo AI

9.4 How TextGo Gets Around AI Detectors like Copyleaks

TextGo takes and removes all the elements that enable AI detection tools to spot AI patterns, like watermarks and generic linguistic characteristics. Afterward, it rewrites the original text in a tone and format that resembles what was written by a human. The content won’t have any generic or robotic tone that triggers detection. 

TRY IT FREE

Part 10: Challenges and Considerations for the Future of Copyleaks AI

The best thing about Copyleaks is it is free to use and allows complete essays and articles to be scanned for AI. It is also reasonably easy to use. Moreover, its other features are quite accurate, but they are only accessible to paid users. 

However, users have complained about its accuracy. Though we did not spot any issues, AI technology is continuously evolving, and such problems could be related to bugs or pending updates. 

Copyleaks should offer free users access to its other features as well, even at a limited capacity.

Conclusion 

This ends our Copyleaks review. It is accurate and quite useful for non-professional users like students to check if their content has any AI. However, you can bypass AI detection on such tools by humanizing your AI content via TextGo AI. It is a quick and easy process.