Our Accurate AI Checker, Plagiarism Checker and Fact Checker Lets You Publish with Integrity

At Originality.ai we provide a complete toolset that helps Website Owners, Content Marketers, Writers and Publishers hit Publish with Integrity in the world of Generative AI! 

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AI Content Detection and More For Serious Web Publishers

Our team at Originality.ai was founded by 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 the most accurate AI detector and additional features that will allow you and your organization to hit publish with integrity… AI Plagiarism Checker, Fact Checker and Readability Checker.

Web Publisher - Be In Control of The Generative AI Content Impact

Do you need a reliable tool to make sure your content is Original, meaning: plagiarism free, fact checked and written by a human writer and not AI generated?

  • Future Proof Your Site on Google - Future proof your site from the potential for Google penalizing AI content and only publish content you know the true Originality of that is factually correct.
  • Systematic Fact Checking Aid - Systematically reduce the chance that you publish a Factual Error or AI generated Hallucination with our Fact Checking solution.
  • Detect if content was AI generated and/or plagiarized 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.
  • Understand AI Usage on Your Entire Site - Scan your entire site to understand the risk of your site being included in future potential AI updates from Google.
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Content Marketing Agency - Prove To Your Clients That Your Content is Original

Do you need to manage a big team and verify large volumes of content are NOT AI generated, factually incorrect or plagiarized?

  • Manage both client and writer expectations regarding the use of AI writing platforms. How much AI created content, if any, is acceptable to use?
  • Prove False Positives are wrong with Originality.ai’s free AI content detection chrome extension and its “watch a writer write” feature.
  • Demonstrate you have a process that reduces Factual Errors and/or AI Hallucinations. 
  • Gain firm control over your organization’s editorial process with team management and report sharing
  • Enhance the likelihood of creating rank worthy content for your clients with our Readability checker
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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 the transparent use of both AI writing tools and AI content detectors. The use of an AI content detector needs to be balanced with tools that can help ensure everyone (including writers, editors, agencies and clients) avoid AI content detector false positives.

  • 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 an AI content detection scan.
  • More Time Writing and Less Time Arguing - All of the features of Originality.ai are geared to ensuring there is trust (accurate AI content 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.
  • Fact Checking Aid to make your fact checking process quicker and more accurate.

    See more benefits of our AI detector and try it for free here.
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Benefits of Originality.ai

With Originality.ai you can add unlimited team members, complete unlimited scans and share reports of you checking if AI Writing Tools were used, content was Plagiarized, if the content has the ideal Readability Score and if Fact Checking was completed..

Accurate AI Detection

The most accurate AI detector including 99%+ accuracy on GPT-4o, Claude 3 and ChatGPT and a 2% false positive rate. AI Detection Accuracy Study & 3rd Party Studies

Plagiarism Checking

With best-in-class plagiarism checks, you can easily identify if content was copied from another source. Originality.ai is the only AI Content Detector or Plagiarism Checker that is accurate at identifying Paraphrase Plagiarism (when a paraphrasing tool is used on either human or AI text). Sign Up

Fact Checking Aid

With our Fact Checking Aid you can reduce the chance of publishing factually incorrect information. Try Fact Checking Aid

Team Management

You can add and remove unlimited team members, manage their access level, and see a complete record of all their activity including AI written content vs Human written content scan scores. Sign Up

AI Content Detector API

Integrate the industry-leading AI detection capabilities into your own tools or workflow. Use the well-documented AI Content Detector API REST API to detect AI-generated content within your current process.

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 Readability Score Study.

Key Features of Originality.ai

Having the most accurate AI content detector is the core feature of Originality.ai! Originality.ai is not just an AI-written text detector but a complete content creation quality control tool. It provides an easy-to-use Fact Checking Aid, AI Plagiarism Checker and a Readability Score Checker that provides the ideal scores to help you rank in Google. Think of Originality.ai as an overall quality tool helping ensure you have well-written content and avoid the pain associated with low-quality content. 

Most Accurate AI Content Detector

most accurate AI checker. It is effective on AI-written text created by popular large language models such as ChatGPT, GPT-4, Claude, Llama and Gemini.

One of the reasons that it outperforms other AI detection tools is that the AI algorithms at Originality.ai use natural language processing techniques which require a lot more compute power. This is also the reason we do not offer a free or ad-supported option.

See Our AI Detection Accuracy Study
See Multiple 3rd Party AI Detection Studies

  • Selected as the Most Accurate - In independent tests Originality.ai has been consistently selected for its superior accuracy score. “The most accurate technology” according to WriterAccess and the most comprehensive 3rd party studies have identified the Originality.ai AI detector as the most accurate. See other similar Testimonials.
  • Paraphrase Detection - The most popular way to bypass other AI or Plagiarism detection tools is to use a paraphrasing tool like Quillbot (often referred to as paraphrase plagiarism). Originality.ai is the only tool to accurately detect if the content has been paraphrased. Our 
  • Full Site Scan - Get an accurate understanding on the risk of AI-generated content being published across an entire website with a single scan.
  • Key Features that Serious Content Creators Need - Built for people who need to manage a lot of content creation complexity. You are able to Add Team Members, See Scan History, Share Scan Results, No Character Limit, Add Tags and utilize a fully featured AI Content Detection API.
  • False Positive Management - With an industry low under 1% false positive rate (Lite model test results)  it is unlikely human-written text will be identified as AI-generated content. However, when a false positive happens we provide a free AI detector and a free Chrome Extension to allow you to visualize the entire human writing process.  
  • 3 AI Detection Models to Suit Your Needs - Your tolerance for the amount of AI allowed in the creation of a document and sensitivity to having false positives is unique. We provide 3 models to suit your needs.

    Lite -  98% accurate, under 1% false positive rate and allows for light AI editing (think grammarly). Best for academia and other use cases that require a low false positive rate

    Standard - 99%+ accurate, under 2% false positive rate and allows for light AI editing. Best for most use cases where false positives can be managed with our free chrome extension and writer playback

    Turbo - 99%+ accurate, under 5% false positive rate, robust against bypassing methods, does not allow for AI editing. Best when you have a strict NO AI policy.
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Automated Fact Checking Aid

We know one of the most important and time intensive tasks for publishing content is fact checking.

This has only become more true in the age of Generative AI where a hallucination or incorrect fact can easily ruin the reputation of a writer, editor and publisher.

AI has made it easier than ever to  create content, and accidentally publishing false facts has never been more likely.

Our automated Fact Checking aid provides lets you…

  • Save Time - Our fact checking aid provides both context and links for all facts letting you verify facts quicker than ever before.
  • Real Time Fact Checking - Our fact checking AI is not limited to a training date cutoff. Verify facts in real-time.
  • Organization Wide Verification - Ensure your editors are fact checking everything and save a record of all articles that were checked.  
  • More Accurate then GPT-4 - Our Fact Checking Aid is not perfect but outperformed all existing LLM’s in our fact checking accuracy study.
  • Try Fact Checking Aid - Here
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User-Friendly Plagiarism Detection 

Originality.ai was initially conceived because heavy users of plagiarism detectors like professional writers or editors needed a better tool. Writing platforms had evolved but plagiarism detectors were still outdated detection tools.

Our easy-to-use and feature-rich plagiarism detector is what serious content publishing operations need to be confident they are publishing high-quality content that is Original!

  • Easy to Understand Percentage Score - Get a score showing the percentage of your content that contains plagiarism.
  • Easy to Identify Text - With the text highlighting in the app and linking to the suspected source site(s), it makes identifying suspected plagiarized online content easy.
  • Shareable Report - You can now verify that writing is free from Plagiarism by sharing a link.
  • All The Features You Need - Add team members, see scan history, shareable reports, auto-billing, paste text, upload files, URL import and tag scans.
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Readability test score

The Right Readability Test and Scores

Not all readability scores are created equal and the prevailing wisdom about what test to use and score to aim for is WRONG.

We completed an in-depth study to identify the ideal Readability Tests and corresponding Scores to aim for if you want to have an article rank well in Google. Our Readability Checker uses these scores.

See the complete Readability study here.

  • Free Readability Test - The readability test is included when you run a plagiarism scan. We have also made a completely free text readability checker.
  • Commonly Recommended Readability Targets Are WRONG - The often quoted “aim for Grade 8 readability” target and tests that are used are simply wrong. They are not what you want to be aiming for to have the best chance of your article ranking in Google.
  • The Right Test and Target Ranges for Google  - Our tool uses the most reliable 4 readability tests and a recommended range that ~70% of the top results in Google have.  
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Seamless Multilanguage AI Detection

Originality.ai’s cutting-edge Multilanguage AI Detection capabilities removes language barriers globally while supporting 15 languages in total. Our advanced AI Detector is your ultimate content QA tool, ensuring that your content is accurately analyzed and understood, no matter where it originates.

  • Accurate and Reliable Results - Breaking down language barriers impacting your content analysis, our Multilanguage AI Detection provides consistent and reliable results across 15 different languages
  • Cultural Nuance Recognition - With an understanding of cultural context and linguistic differences, our AI has been trained on content with cultural contexts providing insights that go beyond literal translation
  • Seamless Integration - With no change to your  workflow and no action required by the user, Originality.ai’s Multilanguage AI Detection automatically detects the language being used to deliver a seamless user experience 
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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

Founder, FatJoe

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


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…

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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


Flexible Pricing

Protect your reputation & 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

Pay As You Go

If you have a one time need to scan documents.



  • 3,000 Credits
    1 Credit Scans 100 Words for Plagiarism and AI Checking
    1 Credit Scans 10 Words for Fact Checking
    Additional Credits $0.01/credit
    2 Year Expiry
  • AI Scan
  • Plagiarism Scan
  • Readability Scan
  • 30 Day Scan History
  • Shareable Reports
  • Standard Support
  • No API
  • No File Upload
    docx, doc, pdf
  • No Full Site Scans
  • No Scan from URL
  • No Team Management
  • No Tag Scans
  • No Access To Future Features


Best solution for most peaple.


per month

  • 2,000 Credits per Month
    1 Credit Scans 100 Words for Plagiarism and AI Checking
    1 Credit Scans 10 Words for Fact Checking
    Additional Credits $0.01/credit
    1 Month Expiry - renews each month
  • AI Scan
  • Plagiarism Scan
  • Readability Scan
  • 30 Day Scan History
  • Shareable Reports
  • Standard Support
  • File Upload
    docx, doc, pdf
  • Full Site Scans
  • Scan from URL
  • Team Management
  • Tag Scans
  • Access To Future Features
  • No API


Best solution for most peaple.


per month • save $29.90 per year

  • 2,000 Credits per Month
    1 Credit Scans 100 Words for Plagiarism and AI Checking
    1 Credit Scans 10 Words for Fact Checking
    Additional Credits $0.01/credit
    1 Month Expiry - renews each month
  • AI Scan
  • Plagiarism Scan
  • Readability Scan
  • 30 Day Scan History
  • Shareable Reports
  • Standard Support
  • File Upload
    docx, doc, pdf
  • Full Site Scans
  • Scan from URL
  • Team Management
  • Tag Scans
  • Access To Future Features
  • No API


Access the API, more credits, and priority support.


per month

  • Everything Included in Pro..
  • 15,000 Credits per Month
    1 Credit Scans 100 Words for Plagiarism and AI Checking
    1 Credit Scans 10 Words for Fact Checking
    Additional Credits $0.01/credit
    1 Month Expiry - renews each month
  • Priority Support
  • 365 Day Scan History
  • API


Access the API, more credits, and priority support.


per month • save $509 per year

  • Everything Included in Pro..
  • 15,000 Credits per Month
    1 Credit Scans 100 Words for Plagiarism and AI Checking
    1 Credit Scans 10 Words for Fact Checking
    Additional Credits $0.01/credit
    1 Month Expiry - renews each month
  • Priority Support
  • 365 Day Scan History
  • API

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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 we tested Originality.ai and the results were it was 99.37% accurate with 1.56% false positives on the known human text. AI detection is different for every model. Below are the detection rates when testing Originality.ai:

  • GPT-3.5 Detection Accuracy: 99.9% accurate
  • ChatGPT GPT4 Detection Accuracy: 83.29% accurate
  • GPT-4 Detection Accuracy: 99.5% accurate
  • Paraphrased (quillbot) Detection Accruacy: 94.7% accurate

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

For all tests we include various human datasets to know what our false positive rate is. It can range from 1.56% to 2.7% in our tests.

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 AI 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 Human

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 Content Detector & Plagiarism Checker for Serious Content Publishers

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