Copyleaks Review 2025: AI Detection Accuracy Test Results

Copyleaks is popular when you want to check for plagiarism and look for AI-generated content. With the rise of AI-content, everyone from teachers to content marketers to businesses and beyond need to check for more than just copying. This tool can also help you see if content was written by a machine instead of a human. But, is this plagiarism and AI-content checker any good? This Copyleaks review will show you the features, price, accuracy, and any downsides so you can see if this is the right content checker for you.

Core Features of Copyleaks

This might seem like a simple tool, but you’ll find all sorts of features under the hood with your Copyleaks subscription.

Let’s review them here:

1.Plagiarism Checker: The main feature you’ll likely use is the plagiarism checker. This scans your content against a database of online articles, wiki pages, academic content, and more. While many plagiarism checkers are only good with English, Copyleaks can detect copied content from different languages. This is especially good for anyone working globally as it can spot copying in many different languages.

2.AI Content Detector: AI is getting smarter by the minute. While some people don’t mind including AI content, others want to remove as much as possible. This tool can scan your content to see if it was written by a human or machine. There is an AI content detector plugin you can use, the full app can tell if the entire document was written by a human or machine, and you’ll get reports that showcase AI versus human content. The system claims to have a detection rate of up to 99.8%.

3.Content Reports: After running a scan for AI or plagiarism, you’ll then get a content report. This detailed report will show you the source content, it highlights the copied sections and percentage of copied content. It also shows where the content was copied from. You’ll see the percentage of how much was copied. While 100% is really bad, you probably won’t have to worry about 1-2%. But, if you see a high percentage, then this lets you know there’s a big problem.

4.Integrations: Copyleaks is all about making it easy, and you’ll find several integrations along with their app. You can easily add Copyleaks to Google Docs or Microsoft Word as an Add-On. Aside from that, you’ll also find integrations with Moodle and even browser extensions.

5.Bulk Scanning: Some Copyleaks subscriptions allow you to scan content in bulk. This is especially useful for teachers, researchers, or businesses that have lots of content to scan for plagiarism or AI content. This bulk API easily lets you scan several documents at once.

Accuracy: How Reliable Is Copyleaks?

Any plagiarism or AI software is only as good as its accuracy. Copyleaks does well in this area. The plagiarism checker engine has near-perfect accuracy. Copyleaks is able to match content with high accuracy even when the content has been heavily paraphrased or reworded. It is a reliable tool to check authenticity of your writing.

However, when it comes to Copyleaks AI content detection feature, it is more controversial. It is good for detecting machine-writing contents but not perfect, sometimes Copyleaks can produce false positives. Copyleaks was once reported to have an accuracy rate of 99.8%. However, within 3 days that rate dropped to 61.6%, which made people question Copyleaks’ credibility. This does not happen frequently but is something you need to keep in mind.

How Much Does Copyleaks Cost?

Copyleaks offers a number of different pricing plans depending on the level of usage that’s best suited for you. Here’s a quick breakdown of what’s available:

1. Free Plan：

Copyleaks offers a free plan with limited capability to do basic plagiarism checks. If you just need plagiarism checker from time to time, it is good enough for you. But you can’t use it unlimitedly and it also restricts the amount of features.

2. Pay as You Go Plan:

Copyleaks offers a pay as you go plan where you can buy credits to use as you need. This is a good option for occasional users who don’t necessarily need the tool every day or month or year.

3. Monthly & Annual Plans:

For those who need Copyleaks on a more frequent basis, there are monthly and annual options available as well. These options come with more scans and priority customer support as well as access to more features, including the AI content detection. The monthly paid plan ranges from around $13.99~99.99, annual bill can save you some bucks.

4. Enterprise Plan&Education Plan:

Copyleaks provides a fully customizable enterprise and education solution. Pricing is based on the organization and scale of usage. For Education Plan, you have to fill up number of full time students before getting a quote. You can talk to sales group for more information.

Copyleaks is a good value for users who need reliable plagiarism and AI content detection. Its higher-end plan might be a issue for people who has a low budget.

Pros and Cons of Using Copyleaks

Pros:

● Thorough Plagiarism Finding: Copyleaks is very good at finding copied material from many places, like school papers and websites in different languages.

● Ability to Spot AI Writing: It can find text written by machines, which is important now with so much AI use.

● In-Depth Reviews: The reviews Copyleaks gives are full of information. They are simple to use and can help you sort out problems right away.

● Works with Other Platforms: Copyleaks works well with many other platforms, like Google Docs and Microsoft Word. This makes it easier for users.

Cons:

●Not Always Right About AI-Generated Content: Copyleaks can tell if text is from a machine or a person, but it is not perfect. Sometimes it marks real text as AI or doesn’t see machine writing.

●Cost: The free version is good for people who use it rarely. But if you want the strongest features and to buy a subscription, Copyleaks costs a bit more than most other options.

Making AI-Generated Content Undetectable

As AI detectors get better, so do humanizing tools for AI that make a AI text statistically indistinguishable from a human-written one. If you run humanized text through Copyleaks, you can see that the score on AI probability factor drops dramatically. Even the best AI detectors can be fooled with the right prompt.

If you want to humanize AI content and still use your content creator tools, GPTHumanizer is the best platform to use. You can use a bunch of suggested prompts to trick detectors, or GPTHumanizer can rewrite the content itself to completely humanize it, overcoming the detector at its source. The problem GPTHumanizer addresses is not how to hide AI content, but how can you create content that was generated with AI but reads exactly as if it was human-written?

The platform takes the telltale patterns readily identified by Copyleaks as AI produced—such as repetitive phrasing, predictable sentence structure, and unnatural transitions—and rewrites them using advanced techniques to identify how people really write and how to create content that mimics it. The result isn’t AI content disguised as human. It is human content, reflecting the richness and unpredictability of real writing, from carefully varied vocabulary to believable text flow and logical leaps.

Conclusion: Is Copyleaks the Right Tool for You?

Copyleaks is a robust, feature-loaded plagiarism finding and AI content analysis platform. It can find duplicate and machine-generated content very well, and is one of the best tools for anyone looking for a way to determine the content authenticity of a given text or passage of text.

That said, it’s not exactly a tool for the casual user. It’s a bit more expensive than many of its alternatives, and it’s not always accurate when it comes to AI content detection. But if you need these features, and are willing to pay for the right to use them, then Copyleaks is worth picking up.