The need to find the best AI detector is becoming increasingly important, and let me tell you why. Since many students are starting to use artificial intelligence to shortcut their work on bachelor’s or major's final degree projects or writing essays, academic integrity is becoming quite a problem for universities, and that’s not all.
AI fraud detection platforms are also used in the financial sector, especially by accountancy firms, to try and detect content that was written using an application such as Writesonic or rephrased using an AI tool like Quillbot. However, this list will contain solely platforms designed to check if the provided material was written by artificial intelligence.
Moreover, since everything is still developing, AI detection software often makes mistakes called false positives. This means that the platform identifies fully human-written text as machine-generated. Hence, a bit later, you will find an explanation for the question: how does AI detection work and why exactly does it mismatch the provided content?
Lately, this particular software has also become useful for companies that hire freelance writers to create material for their websites. Since they want to ensure that they are getting what they paid for and not something that will most likely give them penalties and rank their page lower.
That being said, here is the list that should help you find the best AI detector:
How Does AI Detection Work?
Firstly, it’s important to mention that each AI detection software supports different language models that they can detect, such as ChatGPT, Jasper, or Gemini. That being said, one of the criteria that these platforms use is perplexity, which is a measurement of how unpredictable the text is and how likely it is to confuse the reader.
Seeing as human-written material is more prone to have creative language choices, AI detection software looks for the opposite. In other words, if the text is highly complex, it’s more likely to have been written by a person. Hence, if the perplexity is low, AI detection platforms are prone to flag the content as machine-generated.
Additionally, burstiness is another variable being taken into account. It measures the variation in sentence structure and length. AI text tends to be less “bursty” than human-written. Hence, content with little variation in sentence structure and length has low burstiness, which indicates that the material is likely to be generated by artificial intelligence.
Furthermore, language models predict the most likely words to come next, and artificial intelligence also tends to produce sentences with an average length of 10-20 words. This is why machine-generated text can seem boring and will have low burstiness, which results in getting flagged as AI-written.
Lastly, it is not recommended to solely rely on the provided results to be 100% precise. This is because no tool can provide complete accuracy, and it can only give some indication. There are often cases where AI detection software provides false positive results, which means that it evaluates human-written text as machine-generated.
Criteria for The Best AI Detector
In order to evaluate and pick the best AI detector, we first need to overview the criteria by which all of the platforms will be ranked.
Naturally, the most important one is accuracy. It displays how consistent and good the platform is at detecting AI-generated text. Usually, the process begins by either uploading a file, pasting a URL or providing the software with the written material directly. Then, it proceeds to scan the text and provides a number showing how much of the content is thought to be AI-generated.
Considering how crucial it is not to falsely accuse good-quality material of being written by a machine, it’s highly important to be careful when picking out the platform.
Furthermore, for software to be considered the best AI detector, it has to support a wide array of language models. A few examples are ChatGPT, Gemini, Claude, and Jasper. Hence, I have included information on which of these models each platform supports and even what application has an AI detection remover feature.
Then there is also the topic of user interface, which is crucial since it displays the effort that the brand puts in to ensure that individuals have a pleasant experience. It influences how people interact with the product to achieve their goals and satisfy their needs. Overall, having friendly navigation is a major plus, especially when we consider non-tech-savvy users.
That being said, in this list, you will find the best AI detection tools, with the majority of them having made their platform easy to figure out. Some of them even have a quick run down with messages that prompt as soon as you open the application giving you a guide on all its features.
Lastly, the pricing topic also needs to be addressed since no one wants to overpay for a service that offers the same features as a cheaper one. At the end of each chapter, you will find an additional sector, briefly mentioning the specifics of each subscription and the cost of each plan. I have also made sure to include platforms that you could consider the best free AI detectors.
1. Winston AI - Easy-To-Use Platform for Flagging AI-Written Content
Ranks #1 out of 7 AI Platforms
- + User-friendly navigation
- + Detects various AI models
- + Great accuracy
- + Plagiarism detector
- - Limited language support
- - No URL scanning option
Winston AI is a multifunctional software that can detect AI-generated sentences within text and scan the provided material for plagiarism. These features make it perfect for students, writers, educators, and web publishers. Winston is a leading candidate for the best AI detection software.
One key aspect to mention about this platform is its ability to scan text written in 6 different languages. They consist of English, Spanish, French, Portuguese, German, and Dutch. This feature provides access to a wider audience.
Not to mention that it uses Optical Character Recognition (OCR), which is a science that enables the translation of various types of documents or images into analyzable, editable and searchable data[1]. Simply put, this technology lets Winston AI extract handwritten text from uploaded files.
That being said, let’s discuss the accuracy of this software. The company itself states that they have 96% precision, meaning that it can almost always detect what text was written by artificial intelligence. However, a different source - Scribbr, has tested the platform, and the report says that Winston was only correct 84% of the time.
Furthermore, this software supports all of the major language models, such as ChatGPT, Jasper, Gemini, and Claude. Its ability to detect a wide variety of artificial intelligence platforms places it among the best AI detectors. Additionally, they are making sure to keep up with each large language model (LLM) update in order to not fall behind.
Lastly, let me address Winston AI's interface. It has a user-friendly navigation system. You can either directly copy and paste the text you want to be checked or, as I previously mentioned, use its OCR technology to scan a document.
Afterward, this software will provide you with a report that gives valuable insights into the content and whether it was written by a human or an AI. Additionally, depending on the plan, there is the possibility to use the plagiarism feature that could especially prove useful for students.
What is the Pricing of Winston AI?
Winston AI has a currency system where each word to scan costs 1 credit. That being said, they offer a few plans:
- 7-day free trial - receive 2,000 credits;
- Essential - $18/month and $144/annual for 80,000 credits;
- Advanced - $29/month and $228/annual for 200,000 credits.
That being said, you can test Winston AI without making any financial commitments. However, if you like the software after trying it out, there are a few plans you can choose from. Naturally, a pricier subscription means more features.
2. Originality.ai - Detection Tool Supporting a Wide Selection of AI models
Ranks #2 out of 7 AI Platforms
- + High-accuracy rate
- + Plagiarism detection feature
- + Beginner-friendly
- + Detects a wide array of AI models
- - High pricing
Originality.ai is software specifically designed for copy editors and publishers. Hence, it's not meant for students. The detector itself has been trained on content meant to be published on the web (blog posts, news, books, etc.) instead of all types of written text.
That being said, this is not all that Originality.ai has to offer. This platform has a feature meant to check your content for plagiarism, and it also provides the user with a readability score. These services can really prove helpful for copy editors. Originality.ai is already being called the best AI detector by some people.
If that hasn’t caught your attention, let me tell you about research done to measure the accuracy of this software. The company stated that a published third-party study found Originality.ai to have 95% results. As you can see, the accuracy is near-perfect and since this niche has just started to develop, it’s only natural that there would be space for improvement.
Additionally, Originality.ai is held to be one of the best AI detection methods since it can catch a surprising number of large language models that could have been used to generate content. A few examples are GPT-4, GPT-3.5, Gemini, Llama 2, and even Quillbot-paraphrased text, which is usually really hard to catch for AI detectors.
If you are also wondering how does AI detection work when used on this specific platform, it’s quite straightforward, actually. Originality.ai uses advanced algorithms and powerful language models to analyze how unique a piece of text is. It will then compare the given material to a large dataset that includes both human and machine-generated content.
Then there is also the question of the user interface and whether it’s any good. The platform is not complicated at all and has fairly intuitive navigation. Its interface looks just like any other website, adding to its simplicity and not making anything too flashy while at the same time worsening the user experience.
Moreover, to check content if it would detect any usage of artificial intelligence, you will be given a few methods to do so:
- Copy and paste the text directly into the window;
- Paste from URL;
- Paste from File.
Having such a wide variety of options makes everything much easier. Hence, underlining the fact why it’s a great tool that is also beginner-friendly.
All in all, this is definitely not an AI detection for essay tool. This application is purely designed for writers who need to check the originality (no pun intended) of written material. Seeing as this platform provides features like plagiarism detection and readability score, it could prove useful for many.
What is the Pricing of Originality AI?
Unfortunately, Originality AI is not a free service, but it does have somewhat of a free trial. If you were to install their detection Chrome extension, you would receive 50 credits. However, as soon as you use all of them, you will need to make a payment in order to get more. That being said, 1 credit can scan 100 words for plagiarism and AI detection.
Here are the available plans:
- One-time payment - $30 for 3000 credits;
- Base subscription - $14.95/month for 2000 credits.
One thing to note is that the base subscription does offer more features like file upload, API, and full-site scans.
3. Copyleaks - An Application for Detecting AI Written Content in 30 Languages
Ranks #3 out of 7 AI Platforms
- + Supports 30 languages
- + Writing assistant
- + Detects multiple different models
- - Accuracy varies widely
- - Complex user interface
Copyleaks is a great application for publishing and copywriting, ensuring that everything you post is authentic content. It’s also an awesome AI detection essay tool meant to check academic integrity.
The thing that separates this platform from others is that it looks for human-written content and not machine-generated text. This artificial intelligence was specifically trained to the patterns of human writing. Hence, when Copyleaks software detects irregular patterns, it flags the content as AI-written.
Moreover, the platform supports 30 different languages, but do keep in mind that the accuracy for each of them differs. Surprisingly, Spanish and French have the best overall precision score. It’s said to be one of the best AI detectors used across the Globe.
You might also wonder if Copyleaks's performance is worth attention. The company itself states that it has an accuracy of 99%, however, Skribbr's research reported a precision of 66%. As you can see, the performance evaluations differ quite a bit. That being said, it does offer the possibility of using the services free of charge.
If you think that plagiarism and AI-written content detection are Copyleak’s only features, let me tell you about their writing assistant. It enhances the user’s content creation by improving sentence structure, word choice, and overall spelling. Hence, when integrated with the content detector and plagiarism feature, it makes a great AI detection bypass tool.
It provides a solution that fully empowers the creation of original content. However, do note that this application is not made to commit fraud, such as finishing your writing tasks for school or university and trying to evade any kind of detectors for non-ethical purposes.
Additionally, Copyleaks states that they support numerous language models. The list contains GPT-3.5, GPT-4, Gemini, Jasper 3, and T5. There’s a chance that you may encounter slightly different results, given the type of content being tested. Hence, Copyleaks suggests conducting several tries to receive the most accurate outcome.
Lastly, the user interface is definitely not friendly since it has quite a confusing layout for every feature. The platform is not intuitive and makes it difficult to navigate through. Hence, user experience does indeed fall down since everything is too overcomplicated.
What is the Pricing of Copyleaks?
As I’ve mentioned earlier, Copyleaks does have an option to use it without any financial commitment, making it one of the best free AI detectors. However, for people who would like to have more features such as the plagiarism detector, there are a few plans available:
- Free;
- AI Content Detector - $9.99/month for 100 credits and $95.88/annual for 1,200 credits;
- Plagiarism Detector - $10.99/month for 100 credits and $107.88/annual for 1,200 credits;
- AI + Plagiarism Detection - $16.99/monthly for 100 credits and $167.88/annual for 1,200 credits.
Lastly, it’s worth noting that 1 credit is equal to 250 words.
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4. Undetectable AI - Accurate AI-Written Text Detector
Ranks #4 out of 7 AI Platforms
- + Easy to use
- + AI detection remover
- + Detects a wide array of AI models
- + Good accuracy
- - Small amount of tools and features
Undetectable AI is quite unique because of the features that it offers. It’s one of the few platforms that has AI detection remover services. When Undetectable flags your written text as machine-generated, you get the option to “humanize” it. If you choose to proceed, it will rewrite your content to have the qualities and markers of human-written material.
That being said, before you can use this feature, you must confirm that you won’t use it for academic misconduct. Hence, it does have ethical standards and won’t let its users commit fraud. Additionally, it’s important to mention that this feature is not free, and unfortunately, you will need to purchase a subscription if you’d like to use it.
Furthermore, Undetectable AI is integrated with both free and paid language models a few examples are - GPT-3.5, GPT-4, Claude, and Gemini. Hence, given all of the features, users like to hold this platform as the best AI detector.
Since we are on the topic of language models, let’s overview Undetectable AI’s accuracy. Third-party tests have reported that this platform has 95 - 85% detection rates, and the results are pretty good. Hence, since this service does not cost a penny, it’s only natural that Undetectable AI is being held as the best free AI detector.
Moreover, it has a really simple user interface, ensuring that individuals who decide to use Undetectable AI will have a great time navigating through the platform.
The process itself is straightforward: paste the text you want to be checked into the window. If the text is flagged as machine-generated, you will be able to use the platform's AI detection bypass feature. If you decide to use it, you will need to select the readability level, purpose, and humanization strength.
Overall, Undetectable AI is a great tool for all sorts of individuals seeing as it provides high-quality and a wide variety of features. Hence, people put this platform among the best AI detectors you can currently acquire. Additionally, if you only want to check if your content gets flagged as AI-generated, Undetectable is a great choice since this feature is free of charge.
What is the Pricing of Undetectable AI?
As mentioned above, you are not required to pay for the services. However, if you choose to use the free plan, you will have limited access to the platform features and the number of words you can scan.
Nevertheless, here are the available plans:
- Free;
- Monthly plan (20,000 words/month) - $19/month;
- Yearly plan (20,000 words/month) - $114/annual.
Lastly, if you do not require the AI detection bypass feature, it is most likely not worth purchasing the subscription.
5. ZeroGPT - Free AI Detection Tool
Ranks #5 out of 7 AI Platforms
- + Free to use
- + Paraphrasing and grammar checking tool
- + Capable of detecting a fair amount of AI models
- + Intuitive and beginner-friendly interface
- - Can produce false positives
- - Misleading accuracy statement
ZeroGPT is one of the best AI detection tools, and let me tell you why. This platform is designed for students, teachers, educators, freelancers, copy editors, and more. It’s intended to help recognize any text written by artificial intelligence and also fix grammar or spelling mistakes. However, these are only a few of the many features that it has.
You might also be wondering how does AI detection work with this specific platform. The core principle of ZeroGPT is that it uses its own proprietary synthetic AI, produced using various language models. Also, this platform employs a comprehensive deep-learning methodology trained on a wide text collection from the web and educational datasets.
Furthermore, for an AI detector to be good, it needs to have good precision. That being said, on their website, ZeroGPT states that they have an accuracy of 98%, but from research that Skribbr did, they got a result of 64%, which is significantly lower. However, do keep in mind that this platform is one of the best free AI detectors you can find.
The accuracy is mainly impacted by the platform's algorithm and the language models it uses. Specifically, ZeroGPT is capable of detecting GPT-4, Gemini, Llama, and other AI models.
Additionally, this platform has a widely used feature - a paraphraser. This tool is often used as an AI detection remover since artificial intelligence struggles to recognize machine-generated text when its structure has been changed. Unfortunately, it is too easy to game the systems by using paraphrasing tools[2].
That being said, if you are planning on using this feature, do it for legal purposes only. The disclaimer is necessary since the tool functions as an AI detection bypass, which might lead to individuals using it for non-ethical reasons.
However, there are times when paraphraser will not work, and it may not protect against artificial intelligence designed to flag content written by machines. Hence, this could lead to significant consequences depending on the use case.
Lastly, this platform does have an interface that looks a bit outdated. However, it’s not necessarily a bad thing since the navigation is straightforward and user-friendly, which is a major plus to have.
What is the Pricing of ZeroGPT?
As mentioned previously, this application is completely free of charge. However, there are limitations, such as 15,000 characters per scan, but it should suffice for the majority of people. Hence, for folks who would like to increase the number of words they can enter, here are the available plans:
- Free;
- Pro - $9.99/month and $95.88/annual;
- Max - $26.99/month and $227.88/annual.
Lastly, ZeroGPT offers subscriptions to increase the amount you can scan and generate a PDF report for AI detection.
6. Crossplag - Platform Designed to Mainly Catch Text Written by ChatGPT
Ranks #6 out of 7 AI Platforms
- + Supports more than 20 languages
- + Plagiarism checking tool
- + Fast at scanning the text
- - Limited to mainly detecting ChatGPT
- - Detection accuracy could be improved
Crossplag is an AI detection software that uses vast datasets of information to determine if the provided content is machine-generated or if it was written by a human. It does this by using a combination of advanced machine learning and natural language processing to understand patterns.
Moreover, Crossplag is fine-tuned by training the platform using 1.5B parameters to give the most precise results. One use case of this platform is for teachers and professors to have an AI detection essay method to check if students are maintaining their academic integrity or simply copying and pasting their tasks generated by a machine.
Crossplag mainly uses ChatGPT as its language model in order to detect content written by artificial intelligence. As a result, it wouldn't be able to catch text generated by applications such as Writesonic as it uses model-agnostic, which means that they are not dependent on one large language model provider.
Changing the topic to platform accuracy, Crossplag does not provide an exact percentage of how precise it is. The company states that the tool rarely fails and catches a vast majority of cases. However, research done by a third party has revealed the accuracy to be 58%.
That being said, it’s important to note that the precision of the AI detector platform mainly consists of the quality of the content, the language, and, most importantly, the amount of text provided. Hence, in order to get a grasp of how accurate an application truly is, it’s best to perform the testing yourself, especially if the services are free.
The user interface can also be a tad confusing, but it shouldn’t take more than a few minutes to figure out how everything works. Currently, Crossplag only lets users upload files or paste the text directly into a window. However, they are planning on adding a web import feature.
What is the Pricing of Crossplag?
Crossplag is entirely free to use, making it one of the best AI detectors for those who do not want to commit financially. However, it does offer a few simple subscriptions:
- Free;
- Pay as you go (50 credits ~ 5,000 words) - $9.95;
- Bundle (1,000 credits ~ 100,000 words) - $149.95.
That being said, there is a credit system if you want to upload files directly. Nonetheless, if pasting the content directly into the window suffices, you do not need to purchase a subscription since it is entirely free.
7. Writer AI - Budget-Friendly AI Detector
Ranks #7 out of 7 AI Platforms
- + Can be used for free
- + Intuitive interface
- + Great for long-form content generation
- - Can only detect ChatGPT model
- - Precision could be better
If you are looking for the best AI detector for free, Writer just might be the thing. Its software evaluates your text and calculates how much of it was machine-generated.
To use Writer, you don’t even have to sign up for the platform. You just need to paste the content you’d like to be checked and press the “Analyze text” button. Writer is especially useful for finding AI-written reviews on platforms like Amazon, YouTube, or Google.
It might not be the best AI detector in terms of accuracy or language models it can detect, but it is a budget-friendly solution for draft feedback or public site content checks.
Since the topic of precision was mentioned, let me tell you about the results of research conducted by Skribbr. The accuracy of the Writer was 38%, however, it did not have any false positives, which is good.
That said, it is important to mention that the research was conducted only using the ChatGPT language model since it is the only one that this AI detection platform supports.
Lastly, it has a really intuitive and easy-to-navigate user interface. You can either use its browser platform by entering text directly into the window or pasting a URL, which Writer will then analyze. However, you also have the option to download its API, but this feature does require a subscription.
What is the Pricing of Writer?
As mentioned above, this is one of the best AI detectors you can use for free. However, there is a subscription option if you would like to use Writers API. Hence, here is the pricing:
- Free;
- Team - $18/month/per user (up to 5 seats) and $162/annually/ per user;
- Enterprise - contact the sales team.
To be more specific, only the Enterprise plan contains access to the API, among a lot of other features, including a knowledge graph and access logs.
Conclusion
The rise in popularity of generative AI platforms designed to write content is creating quite a problem, especially regarding academic misconduct. Seeing as students are finding shortcuts when it comes to finishing assignments by using applications such as Writesonic or Quillbot to help them, companies have started to make applications designed to flag machine-generated text.
Moreover, it is difficult to select the best AI detector for each specific use case since it depends on the kind of text that will be scanned. Some platforms are specifically meant to check long-form content, while others are designed to check something as simple as an essay.
With that being said, I hope this article helped you find the best AI detector for yourself. If there were several platforms that piqued your interest make sure to test all of them and see which one fits your needs the best!
The content published on this website is not aimed to give any kind of financial, investment, trading, or any other form of advice. BitDegree.org does not endorse or suggest you to buy or use any kind of AI tool. Before making financial investment decisions, do consult your financial advisor.
Scientific References
1. J. Memon., M. Sami., R. A. Khan., et al.: 'Handwritten Optical Character Recognition (OCR): A Comprehensive Systematic Literature Review (SLR)';
2. D. Weber-Wulff., A. Anohina-Naumeca., S. Bjelobaba., et al.: 'Testing of detection tools for AI-generated text'.
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