Which Is The Best AI Content Detector? [13 Tools Tested]




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Which Is The Best AI Content Detector?

When it comes to detecting AI-generated content, there are many tools available on the market today. Some popular ones include Originality.ai, GLTR, Writer, Hugging Face, Kazan SEO, Crossplag, Copyleaks, Content at Scale and sapling.ai. Additionally, Open AI Text Classifier, GPT Kit, Winston, and Detect GPT are some other noteworthy mentions. The main function of these tools is to check for plagiarism and detect whether the text has been written by a human or generated by an artificial intelligence model.

  • AI content detectors are essential tools for SEO professionals to ensure originality and avoid plagiarism in their content.
  • Originality.ai, GLTR, Writer, and Hugging Face are some popular AI content detection tools that use natural language processing and machine learning algorithms to identify AI-generated text.
  • Other notable options include Kazan SEO, Copyleaks, Content at Scale, sapling.ai, GPT Zero, Content Detector AI, GPT Kit, Winston, and Detect GPT.
  • AI content detectors are increasingly accurate but not perfect. It’s crucial to use these tools in conjunction with manual assessments and other plagiarism checkers for a comprehensive analysis.
  • AI content detectors help SEO professionals adhere to Google’s Webmaster Guidelines and improve their website rankings by ensuring high-quality, original content.

Trying to pass A.I. Detection? Learn the best tricks and hacks with examples here

Best Paid


Great tool that constantly evolves

Best Free

Kazan SEO

Great free SEO suite of tools with AI Detection module

Best Fremium


Modern plagiarism & AI detection tool

I have tested 13 of the most popular detection tools with 3 outputs:

  1. AI output from ai tools that does not usually pass AI Detection (aka ChatGPT (GPT-3))
  2. High Quality AI Output (think Jasper, ZimmWriter, Copy.ai)
  3. Manually written copy (my student work from way back)

AI Detection Tools Testing Results

ToolFree version word limitPaid version word limitLow Quality AI OutputOutput written by a HumanHigh Quality AI Output
Originalityno limit08892
Winstonup to 2,000up to 80,000087100
Sapling300+no limit0,03100100
Kazanno limit0,699,499,9
Writer200+up to 500K39100100
Hugging Faceno limit9710098
Crossplagno limit / trialup to 100K09999
CopyLeaksno limit36,893,620
ContentAtScaleno limit539177
GPT Zeroup to 3,000AIAIAI
AI Text Classifierno limitAInot AInot AI
GPT Kitup to 3,000 1810091
Detect GPT200+AInot AIMaybe
AI Detection Tools Testing Results

Trying to pass A.I. Detection? Learn the best tricks and hacks with examples here

What Tools Detect AI Writing?

There are various tools available to detect AI writing, including Originality.ai, GLTR, Writer, and Hugging Face. These tools use natural language processing and machine learning algorithms to identify whether the text is written by a human or is ai written text an AI system. Some of these systems are free while some charge fees for their services.

Kazan SEO, Copyleaks, Content at Scale, sapling.ai and GPT Zero are other popular options used in the industry. OpenAI Text Classifier and GPT Kit are also reliable tools that can detect AI content with high precision rates. Winston provides users with detailed statistics on the probability of text being generated by artificial intelligence.

Although these tools have advanced features to spot AI-generated content accurately; they cannot provide 100% certainty that every piece of text detected is from ai content generators an automated source. It’s important to note that most detection systems rely on training data and pattern recognition rather than a set criterion for identifying what constitutes “real” or “fake” written texts. As such it’s always essential to apply expert manual assessments; because automated detectors’ level of accuracy varies depending on the quality of their algorithmic engine among many other factors within generating realistic content parameters like word choice tone etcetera all taken into account when evaluating manually what has been flagged as potentially suspicious through automatic generation checking means.


Originality.ai is a powerful AI content detection tool that uses natural language processing to identify plagiarism, paraphrasing and similar text. It can detect the slightest differences in phrasing and structure between two pieces of content making it an essential tool for SEO professionals. The platform also provides detailed reports on detected issues with suggestions on how to resolve them.

One notable feature of Originality.ai is its ability to analyze large volumes of text quickly, making it ideal for handling copywriting projects at scale. With its vast database and advanced algorithms, Originality.ai offers incredible accuracy rates and reliability when detecting AI-generated text. This feature makes it the go-to tool for ensuring originality in articles, blog posts, product descriptions or any written content.

Originality.ai is designed to meet the needs of SEO professionals who require access to cutting-edge technology that simplifies their work processes without sacrificing quality or precision. By using this remarkable toolset, users can guarantee unique content suitable for their website’s objectives while adhering strictly Google’s Webmaster Guidelines – no matter how extensive your library may be!


GLTR (short for “Giant Language Model Test Room”) is an AI content detector that focuses on identifying text generated by machine learning models such as GPT-2 and GPT-3. It leverages natural language processing algorithms to analyze the patterns and structure of a given piece of writing.

One unique feature of GLTR is its ability to highlight sections of text that may be generated by AI, giving users a better understanding of which parts are human-written versus those that are not. This functionality can be particularly useful when reviewing large documents or news articles where it may be difficult to determine the authenticity of certain sections.

Overall, GLTR is a helpful tool for SEO professionals who want to ensure their content is original and free from AI-generated text. By using this resource in conjunction with other plagiarism checkers and detection tools, marketers can feel confident in the quality and reliability of their written materials.


Writer is a popular AI content detection tool that has gained significant attention in the SEO industry. It uses advanced natural language processing algorithms to analyze text and determine whether it was written by humans or generated by AI. Writer can also detect plagiarism, grammar errors, and other issues that impact the quality of written content.

One of the unique features of Writer is its ability to generate a “human content score” that rates the likelihood that a piece of text was written by humans versus AI. This information helps SEO professionals identify which parts of their website content may be perceived as less reliable due to being generated by machines.

Overall, Writer is an effective tool for detecting AI-generated content and improving the quality of web copy. Its advanced features provide valuable insights for SEO optimization and ensure websites are delivering high-quality user experiences that comply with Google’s Webmaster Guidelines.

Hugging Face

Hugging Face is an AI-powered content detector tool that utilizes natural language processing and machine learning to identify AI-generated text. This platform enables users to easily detect any form of plagiarized or spun content with high accuracy levels. Hugging Face also offers a wide range of features, including sentiment analysis, named entity recognition, and text classification algorithms.

One unique feature of Hugging Face is its ability to provide detailed insights into the structure and syntax of human generated content and pieces. The interface allows for the comparison between the analyzed text and known human-written articles from a variety of sources. As such, it becomes easy for writers and editors to assess the originality score of their work before publishing it online.

In conclusion, Hugging Face is one of the most reliable AI-generated content detectors in recent times thanks to its robust set of tools and advanced algorithms. With this tool at your disposal, you can easily identify any instance where artificial intelligence has been used in creating written content while maintaining optimal SEO standards as recommended by Google’s search advocate guidelines.

Kazan SEO

Kazan SEO is one of the top AI content detection tools available today. It uses natural language processing techniques to identify any content generated by AI, including language model tests and news articles. the ai content detection software Kazan SEO also provides a human-written content score, making it easier for SEO professionals to determine the quality of their written work.

One of the benefits of using Kazan SEO is its ability to detect AI-generated content automatically. This means that you can easily ensure that all your web pages are free from plagiarism and original in nature, which is essential for achieving higher rankings on search engines like Google. The tool also comes with a free version along with paid plans, making it accessible to businesses of different sizes and budgets.

To achieve success in SEO, you need to follow Google’s webmaster guidelines carefully. By integrating tools like Kazan SEO into your workflow, you can stay compliant with these guidelines while optimizing your website effectively for search engines. With its robust features and user-friendly interface, Kazan SEO is an excellent choice for anyone looking to improve their website’s ranking while ensuring high-quality content creation practices are followed consistently throughout the process.


One of the AI content detectors worth mentioning is Crossplag. This plagiarism checker is designed to detect copied content even from the most obscure sources on the web. With its advanced algorithms, it can compare your text with billions of other texts across different websites and platforms, ensuring that you get a more comprehensive check.

Crossplag boasts an impressive scan engine designed to crawl deep into websites’ archives for previously unpublished materials that may contain parts of your text without proper referencing or citation. Its unique features entail language recognition capabilities, which enable you to scan text in multiple languages simultaneously.

Using Crossplag ensures that your website’s content remains original and free from duplicate or plagiarized material, meeting Google’s Webmaster Guidelines on production quality signals for ranking factors. It gives SEOs peace of mind knowing their client’s website has high-quality and original content while adhering to best practices in search engines optimization.

In conclusion, every SEO should consider investing in an AI-powered tool such as Crossplag when creating copies for clients since it provides detailed checks that go beyond simple keyword matching techniques used by most traditional plagiarism checkers. With such tools, one can ensure top-notch quality work tailored explicitly towards improving domain authority through valuable and authentic content creation.


Copyleaks is one of the best AI content detection tools available in the market today. This free tool uses advanced artificial intelligence algorithms to help SEO professionals and writers detect any plagiarism or duplicate content on their website. Copyleaks scans millions of web pages within seconds, providing accurate reports that can be used to improve website rankings.

Using Copyleaks is easy and seamless- simply upload your content (in various formats such as .docx, .pdf, or plain text), and wait for the analysis report. The tool provides a comprehensive analysis covering extensive databases from academic journals, websites, books, social media platforms, and more. It also offers multi-language support which allows users to scan documents in different languages.

In conclusion, Copyleaks’ powerful algorithms make it an essential AI writing tool for anybody looking to optimize their writing capabilities. It’s effortless integration with other tools such as WordPress makes it even more convenient for SEO specialists who want quick results without having to spend too much time going through countless articles online manually. With its ability to provide highly detailed reports on potential duplicates across multiple mediums – including social networks like Twitter – there’s no denying that Copyleaks is worth considering if you’re serious about detecting AI-generated content effectively.

Content At Scale

One of the AI content detection tools that have been making waves in recent times is Content at Scale. This tool uses Natural Language Processing (NLP) to detect ai written content, AI-generated text, human-written text, and even plagiarism. It analyzes written content from all possible angles and generates a unique score for each piece, indicating whether it’s generated by an AI or crafted by a human.

With its advanced algorithms, Content at Scale can separate between well-crafted human-written articles and copied texts with near-perfect accuracy. SEO professionals can use this tool to ensure that their website has authentic and quality content, keeping away any unethical practices such as copying others’ work.

In conclusion, if you’re looking for an efficient way to monitor your website’s authenticity through its content, consider trying out Content at Scale. With its ability to identify both AI-generated writing and plagiarism accurately, you may rest assured knowing that your online presence remains one step ahead of the game in terms of quality control.


One of the AI content detection tools that is rapidly gaining popularity among SEO professionals is sapling.ai. This tool uses natural language processing (NLP) technology to analyze text and detect any signs of AI-generated content. Its algorithms can distinguish between human-written text and machine-generated text with high accuracy.

What sets sapling.ai apart from other content detectors is its ability to identify not only plagiarized content, but also low-quality writing that may be flagged by Google’s search algorithm. By highlighting areas where improvements can be made, sapling.ai helps writers create better quality content that ranks higher in search engine results pages.

Overall, sapling.ai is a reliable and effective tool for detecting AI-generated content and improving the quality of written material. Its sophisticated analysis capabilities make it an invaluable resource for SEO professionals looking to ensure their clients’ websites are full of original, engaging content that meets Google’s webmaster guidelines.

GPT Zero

GPT Zero is an AI content detector created by EleutherAI. It is a language model based on the popular GPT (Generative Pre-trained Transformer) framework that’s designed to identify AI-generated text accurately. The tool uses natural language processing and machine learning techniques to detect whether a piece of content has been generated by an algorithm or written by humans.

One significant advantage GPT Zero offers over other similar tools is its open-source nature, allowing developers to tweak and refine the model continuously. Additionally, it can detect both short and long-form pieces of writing with high accuracy. This makes it an excellent tool for SEO professionals looking to ensure their content isn’t being flagged as plagiarized or penalized for using AI-generated text.

In conclusion, if you’re looking for a reliable AI content detection tool, GPT Zero could be your best bet. Its open-sourced nature offers flexibility in tweaking models while still maintaining optimal performance levels to identify any potential plagiarism issues in your content automatically. As such, incorporating this revolutionary tool into your workflow can help you save time and money while ensuring all your web pages are SEO compliant according to Google’s Webmaster Guidelines.

Content Detector AI

ContentDetector.AI is an online AI content detector that checks any written text material that is AI generated, including Chat GPT, GPT 3, and GPT 4 written content, and delivers an estimated percentage score based on the likelihood that the text content was generated by AI tools or software. It can count words and is completely free to use. The tool is easy to use and has a lot of functionality. It is a ChatGPT plagiarism detector and AI Checker. Users only need to copy and paste the content into the text field to check.

The tool is used by bloggers and academics to identify any article containing AI-generated content. The tool is trained on GPT 3 output, and it can detect GPT 3 content accurately. It can also identify GPT 4 content and ChatGPT-generated content with reasonable accuracy. The tool is constantly being improved to detect AI content from other tools such as Copy.AI. The tool is useful for bloggers and content writers to check whether external or internal writers are utilizing an AI writer to create the material. It is also useful for academicians and universities to determine whether the essays provided by students are legitimate.

The tool also has a word counter feature that helps authors satisfy word count requirements for articles, essays, and reports. The tool presents the AI detection results in a clear and visually appealing percentage form without any character limit restrictions. However, it is difficult to detect any kind of content, and it is almost impossible to get an accuracy rate close to 100% when detecting AI content. The tool is not perfect and requires users to utilize the tool along with their judgment to determine whether the content was created by AI.


One popular AI content detector tool is GPT Kit. This tool uses Natural Language Processing (NLP) to analyze text and determine if it was generated by an AI language model, specifically the GPT-2 or GPT-3 models.

GPT Kit can detect AI-generated content with high accuracy, making it a valuable resource for SEO professionals looking to ensure the originality of their website’s content. The tool provides a confidence score that indicates how likely the given text was created by an AI language model.

The benefits of using GPT Kit include its ability to integrate with other tools such as plagiarism checkers and its user-friendly interface. However, it’s important to note that no AI content detector tool is 100% accurate, and there may be some false positives or negatives when using these types of content detector tools.

Overall, GPT Kit can be a useful addition to an SEO professional’s toolkit for detecting and ensuring the authenticity of written content on websites. It helps maintain high-quality standards in writing while also saving time in identifying potentially problematic material.


Winston is an AI content detector that helps SEO experts to determine the originality of written text. The tool uses natural language processing (NLP) technology and machine learning algorithms to scan through web pages, analyzing the content structure as well as its wording. Winston compares scanned text against a vast database of existing online sources, providing users with a score indicating how likely it is that their content has been plagiarized.

One of Winston’s most significant benefits is its ability to detect subtle differences in content phrasing, even when matching phrases are not identical. This means that SEO writers can be confident that they’re producing unique material while avoiding penalties for duplicate content from Google’s search engine algorithms. Furthermore, Winston offers real-time feedback on writing style and tone, giving digital marketers valuable insights into how readers might respond to their copy.

Overall, Winston is an excellent choice for those looking for reliable AI-driven plagiarism detection tools. While other similar tools exist in the market today, few offer the same level of accuracy or ease-of-use as this innovative platform. For SEO professionals seeking quality assurance and peace-of-mind when creating new website copy or articles – whether human-generated or AI-created – adding Winston to their toolkit may be one way they can achieve these goals efficiently and effectively.

Detect GPT

Detect GPT is one of the powerful AI content detection tools that are taking over the SEO industry. This tool was built specifically to detect text generated by GPT-2 and GPT-3 language models, which are widely used in creating AI-generated content. Its ability to identify automated writing has made it very popular among SEO professionals who want to ensure that their websites have only human-written content.

The Detect GPT algorithm works by analyzing various linguistic features in a given piece of text, such as grammar, syntax, spelling mistakes, punctuation errors, and even word choice. Once it detects any anomalies or patterns consistent with an AI-generated text, it flags the content for review. The tool also provides users with a detailed report on any detected artificial language construction present in the submitted text.

While Detect GPT is highly effective at detecting machine-generated sentences within written texts accurately, it’s crucial to note that no current method can achieve 100% accuracy when dealing with complex tasks like identifying non-human created texts fully. Therefore combining its results with other state-of-the-art anti-plagiarism software can help achieve more precise outcomes while avoiding false positives or negatives.

How Reliable Are AI Content Detectors?

AI content detectors have come a long way and are becoming increasingly popular among SEO professionals. However, the question of their reliability remains valid. The accuracy of detect content generated by these tools depends on various factors such as the quality of the AI model used to develop them, their capability to recognize and differentiate between human-written text and AI-generated text, and how frequent they update in response to new language models.

One significant advantage that AI content detectors bring is their ability to quickly detect plagiarism by comparing any submitted text with vast databases of previously published articles. These tools can also identify instances where an author may have unintentionally copied content from another article or source material without proper citations.

However, it’s essential to note that no machine learning algorithm is perfect yet. There might be instances when an AI content detector produces false-positive results or fails to detect some cases of plagiarism accurately. As such, relying entirely on these tools for detecting originality could be misleading at times.

Conclusion and final thoughts 💭

In conclusion, AI content detectors are valuable tools for SEO professionals, offering several advantages:

  • Quickly detect plagiarism by comparing submitted text with vast databases of published content.
  • Identify instances of unintentional copying without proper citations.
  • Continuously update and improve as new language models are developed.

However, it’s essential to keep in mind that no AI content detector is perfect, and there may be occasional false positives or missed instances of plagiarism. Therefore, it’s crucial to use these tools in conjunction with other plagiarism checkers and manual assessments to ensure accurate results and maintain high-quality, original content on websites.

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