Dale R.
horribly wrong !!!
horribly wrong!!! Do a little twitching with Grammarly, and now you are AI.

Copyleaks is a leading AI-based content detection platform that helps businesses, educators, and publishers verify the authenticity and originality of digital content. Founded in 2015, Copyleaks is trusted by more than 500 enterprises and educational institutions across 100+ countries and processes over 30 million scans every month. Copyleaks was named the No. 2 company on TIME and Statista's 2025 World's Top EdTech Rising Stars list and recognized on Inc.'s 2025 Best in Business list for Best AI Implementation.What Copyleaks detects: AI-generated text — from models like ChatGPT, Gemini, Claude, DeepSeek, and Llama, across 30+ languages, with over 99% accuracy on English-language content. AI-generated images — from tools like Midjourney and Stable Diffusion, pinpointed down to the pixel level. AI-generated video — newly launched detection for models like Google Veo and Runway. Plagiarism — scanning 60 trillion web pages, 16,000+ academic journals, and internal documents in 100+ languages to find every match and trace it back to its source.Beyond detection, Copyleaks supports AI governance, intellectual property protection, and copyright compliance, with a flexible API and integrations for popular LMS and workflow tools — giving teams clear, dependable answers they can act on.Copyleaks is used by global enterprises protecting intellectual property, publishers safeguarding original work, and universities and school districts defending academic integrity. In a world where anyone can generate text, images, and video in seconds, Copyleaks turns the uncertainty of generative AI into something organizations can measure, manage, and trust.Copyleaks — where technology meets integrity.
Copyleaks (copyleaks.com) has 374 customer reviews on Five Star Index, with an average rating of 2.9 out of 5.
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Showing 182 reviews with 1 star · Clear filters
Dale R.
horribly wrong!!! Do a little twitching with Grammarly, and now you are AI.
Mwenjeri G.
Unreliable, flagging everything as AI generated. I tested a document I wrote in 2015 and still detected AI garbage.
Response from CopyleaksAug 30, 2023
We're sorry to hear you had a bad experience. We take false positives very seriously - if you could email your example to [email protected] and we will look into it.
Lucky P.
I've used ai to paraphrase sentence in my work, usually being careful as the content have not been generated by ai but instead paraphrased and further paraphrased using quillbot and hand written changes which is have been considered 100% human in all other available ai checker, but only copy leaks dispays it as 97% so i thought that maybe i lacked content which was not enough to be correctly detect and as such scanned the whole paragraph that i've written myself along with that 1 sentence and suprise even my whole personally written paragraph is considered as ai generated.. guess i'm an ai seeing that even what i write on my own instead of paraphrasing research is considered to be 80%+ ai generate. ps: i checked what i've written here on copy leaks again and even this is considered as 21% ai generated also copyleaks if you see this, stop advertising yourself as the most accurate when you aren't even close to being the supposedly 98%+ accurate
Response from CopyleaksAug 22, 2023
We are sorry that your experience with Copyleaks was not a good one. We are always working to improve our models and take feedback like this very seriously.
Jorge P.
Detección de IA muy ineficiente. Contenidos 100% humanos los detecta como IA, no recomiendo su uso
simon M.
My experience with the CopyLeaks AI Checker left me utterly bewildered and frustrated. This so-called plagiarism detection tool not only failed to deliver on its promises but also displayed a shocking lack of understanding, mislabeling original content as AI-generated. It is safe to say that this platform is nothing short of a foolish endeavor. One of the fundamental issues with CopyLeaks AI Checker is its propensity to incorrectly identify original content as AI-generated or plagiarized. Despite submitting entirely authentic and unique documents, the tool repeatedly flagged sections as potential instances of plagiarism. This glaring error undermines any trust one might have had in the system's capability to differentiate between genuine content and plagiarized material. How can we rely on a tool that cannot distinguish between original work and AI-generated text? Furthermore, the platform's inability to comprehend the context and nuances of the submitted documents is utterly baffling. The algorithmic approach employed by CopyLeaks AI Checker seems incapable of recognizing the distinct voice, style, and intent behind different pieces of writing. Consequently, it haphazardly marks portions of original content as potentially plagiarized, leading to a lack of confidence in the system's accuracy and intelligence. Not only does this mislabeling of original content reflect poorly on the tool's functionality, but it also hampers the overall user experience. Spending valuable time submitting authentic work only to have it flagged as AI-generated or plagiarized is frustrating and counterproductive. It exposes the superficiality and lack of sophistication of the CopyLeaks AI Checker's algorithms, making it an impractical and ineffective platform. Given these significant shortcomings, it is evident that the CopyLeaks AI Checker is a monumentally flawed platform. Its inability to accurately identify original content, coupled with its failure to comprehend contextual nuances, renders it a foolish and unreliable tool. If you value the integrity of your work and seek a genuine plagiarism detection solution, I strongly recommend exploring alternative platforms that demonstrate a better understanding of originality and context.
Response from CopyleaksAug 2, 2023
We are sorry that your experience with Copyleaks was not a good one. We are always working to improve our models and take feedback like this very seriously.
Gabriel A.
Copyleaks, as an integrity-checking tool, 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.
Response from CopyleaksAug 2, 2023
I apologize that you did not have a positive experience using Copyleaks. We continually strive to enhance our models and greatly value feedback like yours to help us identify areas needing improvement. We will carefully consider your comments as we work to optimize our service. Please let us know if you have any other suggestions on how we can provide a better experience in the future.
Toni
I wanted to try the free trial and provided all my data, but it was not possible. I have been forced to pay. So I cancelled my account.
Rodney G.
This review concerns the AI detection. The AI detection for copyleaks is inaccurate. I will demonstrate to you why you should avoid it. I scan a 7 page paper in copyleaks at 7.40 AM later in the day and it does not flag any content as AI content. i recheck the paper once more AT 6.30PM and this thing flags almost half of the content as AI written. I go a step further to scan the same content using turnitin which shows that the the content is entirely human written. To build confident in this result, i go a step further to confirm this using other softwares like GPTKIT [which uses 6 probabilistic models], GPTZERO, and ZEROGPT which confirms the content is NOT! AI WRITTEN as copyleaks alludes. Your AI detection capability is very unreliable!!!!
Response from CopyleaksAug 2, 2023
We sincerely apologize that your experience with our Copyleaks service did not meet your expectations. As a company focused on continuous improvement, we highly value candid feedback in order to refine our offerings. We will carefully review your comments and use them to make meaningful enhancements to our models and overall service. Please do not hesitate to provide any additional feedback so that we can provide you with a better experience moving forward.