99% Detection Accuracy

Accurate AI & Plagiarism Detector for Serious Content Publishers

The most accurate Chat GPT and GPT-4 AI detector built specifically for content marketers and SEOs.

Trusted By Industry Leaders

Built For Serious Web Publishers

Originality.ai is built by a team of content marketing and AI experts who deeply understand your needs. By focusing our solution on the world of Web Publishers we are able to build a more accurate AI detector and Plagiarism Checker that your team will want to use!

Web Publisher - Get What You Paid for & Future Proof Your Site

Do you need to make sure your content is original, meaning: plagiarism free and written by a human writer and not AI?

  • Protect Your Site - Future proof your site from Google updates and only publish content you know the true Originality of.
  • Detect if content was AI generated and/or plagiarised with all data housed and saved in one place. You will no longer need to rely on anyone's promise that it is plagiarism free or waste time scanning it yourself.
  • Bulk Site Scan - Scan your entire site to understand the risk of your site being included in future potential AI updates from Google.
  • Rank better on Google Search Engines using our best-in-class Readability feature
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Content Agency - Prove To Your Clients That Your Content is Original

Do you need to manage a large team and verify at scale that original content is being produced?

  • Manage both client and writer expectations around AI use. How much AI, if any, is acceptable to use?
  • Prove False Positives are wrong with Originality.AI’s free chrome extension.
  • Gain firm control over your organisation’s editorial process with team management and activity history functions.
  • Enhance the likelihood of creating rank worthy content for your clients with our Readability Feature
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Writer - No More False Positives

As a writer generative AI models like Chat GPT are both a blessing and a curse. At Originality.AI we believe in transparency of AI usage between writers, editors, agencies and clients. 

  • Prove False Positives are Wrong - With our free Google Chrome extension you can prove (with no extra effort) that you truly wrote the article by allowing clients to visualize the creation process. 
  • Shared Confidence With Clients - Originality.AI is the most accurate AI detector and you can easily share (via a link) the results of your content being scanned.
  • More Time Writing and Less Time Arguing - All of the features of Originality.AI are geared to ensuring there is trust (accurate AI detection, report sharing, visualize the creation process) with you and your clients getting you paid faster. 
  • Use the results of our in depth readability study to optimize every piece of content you create to the ideal readability score.
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Customers Love Originality.ai

We deeply understand your needs when it comes to identifying Original content and we are building features around our accurate AI detection and Plagiarism checking that users love!

After testing a number of AI content detection tools, I have found Originality.ai to be one of the best on the market. And now with the ability to detect paraphrased AI content, Orignality.ai is even more powerful. It’s basically my go-to detection tool at this point.

Glenn Gabe

SEO Consultant, GSQI.com

At Clicking Publish, producing original, high-quality content is essential to our success. To maintain these standards, it's important that we verify the work from freelancers and outsourced writers. Originality.ai makes this process easy for us by providing a simple and efficient tool that ensures the content we receive meets our expectations.

Kityo Martin

Clicking Publish

I love the tool. Not only does it detect ACTUAL Al written content, but also writers who write just like Al. Great way to weed out Al and poor writing. Just because content was written by a human doesn't mean they did any better than an Al tool. We had a lot of our writers test positive for Al and they didn't use Al. What was common in all their writing was the lack of original thoughts. It was all regurgitation.

Ryan Cunningham

After doing some serious testing with Originality (which caters for the newerAl tech), I can't fool it (yet).

Joe Davies

So what can we learn from this? In many cases, the tool tells the right story, even when it's nuanced, like in the case of AI content edited by humans.

Gael Breton

Founder, Authority Hacker

I realize that AI content isn't going away and with human editing, it can save time/make blog content better. That said, I've also had writers submit content that was 100% AI and never told me. A BIG no-no. This tool (Originality.ai) is what I'm using to stop that.

Ron Stefanski


Benefits of Originality.ai

With Originality.AI you can add unlimited team members & complete unlimited scans checking if AI Writing Tools were used, content was Plagiarized and if the content has the ideal Readability Score.

Accurate AI Detection

The most accurate AI detection tool including 99% accurate on GPT-4, 83% on ChatGPT (GPT-4 powered) and ~2% false positives. AI Detection Accuracy Study

Team Management

You can add and remove unlimited team members, manage their access level and see a complete record of all their activity. Sign Up

Full Site Scan

Simply enter a URL and scan the entire site for AI generated content or Plagiarized content. Sign Up

Simple Pricing - $0.01/100 Words

Improved functionality and lower cost than your current plagiarism only detector. Sign Up

AI Detection API

Integrate the industry leading AI detection capabilities into your own tools or workflow.

Chrome Extension

Achieve the greatest level of transparency on your creative process using our Chrome Extension.

Plagiarism Checking

With best in class plagiarism checking your can easily identify if content was copied from another source. Sign Up

Readability Score

See the readability score of your content. Originality.AI completed a 20k result study identifying the target readability score for the top results on Google. See Study.

Shareable Reports

With the Share Scan link you can can easily show anyone that your content meets your AI, Plagiarism and Readability requirements. Sign Up

In The Press

Originality.AI has been featured for its accurate ability to detect GPT-3, Chat GPT and GPT-4 generated content. See some of the coverage below…

View All Press
Featured by Leading Publications

Originality.ai did a fantastic job on all three prompts, precisely detecting them as AI-written. Additionally, after I checked with actual human-written textual content, it did determine it as 100% human-generated, which is important.

Vahan Petrosyan


I use this tool most frequently to check for AI content personally. My most frequent use-case is checking content submitted by freelance writers we work with for AI and plagiarism.

Tom Demers


After extensive research and testing, we determined Originality.AI to be the most accurate technology.

Rock Content Team


Jon Gillham, Founder of Originality.ai came up with a tool to detect whether the content is written by humans or AI tools. It’s built on such technology that can specifically detect content by ChatGPT-3 — by giving you a spam score of 0-100, with an accuracy of 94%.

Felix Rose-Collins


ChatGPT lacks empathy and originality. It’s also recognized as AI-generated content most of the time by plagiarism and AI detectors like Originality.AI

Ashley Stahl


Originality.ai. Do give them a shot! 

Sri Krishna


For web publishers, Originality.AI will enable you to scan your content seamlessly, see who has checked it previously, and detect if an AI-powered tool was implored.

Industry Trends


Clear Simple Pricing

Protect your reputation and improve your content quality by accurately detecting plagiarised content and artificially generated text.

At Clicking Publish, producing original, high-quality content is essential to our success. To maintain these standards, it's important that we verify the work from freelancers and outsourced writers. Originality.ai makes this process easy for us by providing a simple and efficient tool that ensures the content we receive meets our expectations.

Kityo Martin

Founder, Workaguide.com


per 100 words checked

  • Unlimited team members
  • Unlimited websites
  • Unlimited scans
  • Plagiarism detector
  • AI writing tool detector
  • Scan any email, document or website
  • Manage team access levels and activities
  • AI detection API
  • Chrome extention
  • Simple Pricing & Renewal

Frequently Asked Questions

Does Originality.AI Have a Free Trial?

Yes, you can get 50 credits by installing the free AI detection Chrome Extension to test Originality.AI’s detection capabilities. 1 credit can scan 100 words.

Can I See Previous Scans?

Yes, all scans are stored for later retrieval or sharing. Complete removal of your account and data is available upon request. 

What Languages Does the AI Detector Work For?

Originality.AI’s AI detection is currently only trained and tested against English language. Plagiarism checking works across multiple languages. 

Can Originality.AI Detect Chat GPT Content?

Yes, Originality.AI can detect ChatGPT content. 

Can Google Detect and Penalize AI Generated Content?

We completed a correlation study of 20,000 web pages and identified a small correlation between Originality score and Google search result ranking. Potentially indicating that AI content performs worse in Google than Original content. 

Google has said that the appropriate use of AI to make content more useful is not against their guidelines. 

However, they have cotninued to be clear that the use of AI in an effort to game search results is against their guidelines. “Using automation—including AI—to generate content with the primary purpose of manipulating ranking in search results is a violation of our spam policies.” https://developers.google.com/search/blog/2023/02/google-search-and-ai-content

Or worded another way from John Mueller…


At Originality.AI we are not against AI content but believe that the decision to accept the Google risk of publishing AI generated content should be the decision of the website owner and not the writer. 

Do Credits Expire?

Yes, per our Terms and Conditions credits expire in 2 years from the date of purchase.

Do you Have a Plagiarism Checking and AI Detection API?

Yes, we have a robust API and have integrated it into the content operations platforms for some of the largest publishers / writing agencies and marketplaces in the world. 

Full documentation is in the backend. If you have a unique use case or are wondering about capabilities to handle your volume please reach out and we will be happy to discuss your needs.

How Does AI Detection Work?

Our internally built artificial intelligence uses supervised learning with multiple models including a modified BERT model to predict if content is AI or Original. Our AI has been provided with millions of records both AI and Original content then trained to tell the difference between the two. After each training session a large test data set is used to evaluate if the new model is an improvement or not. 

What Do AI Detection Scores Mean?

AI detection scores are a prediction on the chance that the text submitted was AI generated or Original. They are not a measure on the amount of AI vs amount of Original content in a given text. 

We recommend not applying a similar “hard” rule when it comes to working with AI scores and writers. If a writer consistently has high Originality scores but then on one article has a higher AI score, this could very likely be a false positive and further investigation should occur. 

Here is our guidance on how to interpret the AI scores for writers.

Does Originality.AI Provide Paraphrase Detection?

Yes, Originality.AI’s AI is the only available AI that has been trained to detect if content has been paraphrased with a tool like Quillbot. If a piece of text, regardless of whether it started as AI or Human, is run through a paraphrasing tool like Quillbot Originality.AI will identify the content as AI generated 95% of the time. 

Read more about Paraphrase Plagiarism Checker

See a quick live test: https://youtu.be/OK5JnBtbbRo

The image below shows the detection accuracy for our Paraphrase Checker:

What Can Cause False Positives?

False positives in AI detection do occur and we are sorry if Originality.AI identified your content as AI. It is different for every tool and a specific reason on what the AI identified as causing it to predict the con

Here are 7 tips for minimizing false positives…

  1. A detection score of 60% Original and 40% AI is not a false positive. It correctly predicted with 60% confidence that your content was Original. The meaning of the score is not that 60% was Original and 40% was AI it means it is 60% confident the content is Original.
  2. Editing AI-written content is not a false positive - it is a true positive
  3. Having AI edit your work is not a false positive - it is a true positive
  4. When any amount of AI touches the content it can cause the entire article to be flagged as AI
  5. “Cyborg” writing where a lot of AI tools are used to create an outline, suggest edits, optimize the content can increase the chance of a higher AI score. (For this reason we created a free content optimizer tool similar to SurferSEO or MarketMuse but 100% free that does not use AI to reduce the chance of a false positive occurring.)
  6. Strange formatting can reduce the accuracy of the detector tools causing an increase in false positives or false negatives. 
  7. The shorter the text the less accurate the detection score. We recommend at least 100 words being checked. 

We apologize if our tool has incorrectly identified your writing as AI!

What do you do if you have been falsely accused of using AI?
  • See our in depth guide on avoiding and managing AI detector false positives 
  • Students - Make sure your teacher is educated on the current AI detection accuracy. Provide any details you have on the creation process. Using a Google Document and providing a screen recording. An AI detection score alone should not be used for academic integrity discipline. 
  • Writers - Create your content in a Google Document and share the free Originality.AI chrome extension with your clients so that if there is any False Positive you can prove you created the document. Share how we recommend people use the AI detection score. AI detection is not the same as plagiarism checking and should have a more nuanced approach to what is and is not acceptable.    
  • Agencies - The first thing any content agency needs to be doing is to define if it is acceptable for writers to use AI and if it is not then develop a process for checking. If you are choosing to use AI in producing content then make sure to communicate that transparently with clients. If you have clients that have accused your agency of having content produced by AI rather than human than refer to your company's policy/procedure for checking work and show the scan history of the writers work. 
False Positives - What Do I Do If I Have Been Falsely Accused of Using AI?

A false positive is when human-written content is identified as AI-written text by an AI detector. False positives do occur and can cause a lot of pain. Across hundreds of thousands of tests we currently see false positives occurring about 2% of the time that human work is submitted. 

2% false positives, despite being the lowest in the industry based on our accuracy test, is too high.  

The AI researchers and machine learning engineers at Originality are working constantly to both improve detection accuracy and reduce false positives. 

We are heavily focused on equipping writers with tools to help them prove their contents Originality.

It was for the purpose of helping writers prove that their work was original that we developed a free Chrome Extension that allows anyone to visualise the creation process of a Google Document

Free AI Detection Chrome Extension

How Does Originality.AI Compare to Other AI Content Detectors?

Originality.AI is the most accurate AI content detector producing the fewest false positives while also the only tool that accurately identifies a piece of content (human or AI) that has been paraphrased. 

See the complete study analyzing how Originality.AI matches up in detection capabilities to other AI detectors here - See Case Study.

The image below shows the results of a test of 1200 text samples, 600 AI generated and 600 human generated tested across multiple AI detectors:

The table below shows the features Originality.AI has including…

  • AI Detection
  • Plagiarism Checking
  • Paraphrase Detection (only tool to offer this)

Originality.AI is more than an AI detector. We are an innovative organization building out a comprehensive suite of content QA tools that will help you gain control over the quality of your content. Readability scores will be added in the near future. 

How Accurate is Originality.AI AI Content Detection Tool?

On the last OpenAI GPT-4 model Originality.AI was tested to be 99.37% accurate with 1.56% false positives. AI detection is different for every model. Below are the detection and false positive rates when testing Originality.AI:

  • GPT-3.5 Detection Accuracy: 99.9% accurate, 2.1% false positivesx
  • ChatGPT GPT4 Detection Accuracy: 83.29% accurate, 2.7% false positives
  • GPT-4 Detection Accuracy: 99.5% accurate, 2.2% false positives
  • Paraphrased (quillbot) Detection Accruacy: 94.7% accurate, 2.5% false positives

See our complete AI Detection Accuracy study to see how Originality.AI compares to other AI detectors. 

The image below is what is called a “confusion matrix” that is used to assess the accuracy of a AI prediction machine. Each prediction our AI makes on a test data set is grouped into one of four buckets…

  • True Positive - AI detector correctly identified content as AI
  • False Negative - AI detector incorrectly identified AI content as Human
  • False Positive - AI detector incorrectly identified human content as AI
  • True Negative - AI detector correctly identified human content as AI

The image below shows the confusion matrix for Originality tested on GPT-4 generated content. 

What is AI Generated Text?

AI-generated text is words that have been written by Artificial Intelligence (AI) specifically using Large Language Models (LLMs). The most common example is OpenAI’s ChatGPT which is an AI using OpenAI’s NLP Models (GPT-3, GPT-3.5 and GPT-4) to understand a users prompt and provide a written response.

For the purposes of AI text detection we aim to flag any content that has been meaningfully changed by AI. We try and take an approach consistent when defining what is Plagiarism “Presenting work or ideas from another source as your own.” when training our AI detection model. 

Slight editing with Grammarly or similar is NOT considered AI generated. 

For reference here is what we aim to identify as AI or Original…

  • AI Generated and Not Edited =  AI Generated Text
  • AI Generated and Human Edited = AI Generated Text
  • AI Outline, Human Written and heavily AI Edited = AI Generated Text 
  • AI Research and Human Written = Original Human-Generated
  • Human Written and Edited with Grammarly = Original Human-Generated
  • Human Written and Edited = Original Human-Generated

AI & Plagiarism Detector for Serious Content Publishers

Improve your content quality by accurately detecting duplicate content and artificially generated text.