Plagiarism Checker Grammar Checker Content Quality Guideline Checker Readability Checker A modern, patented, Al-powered plagiarism checker that is more accurate than Grammarly & Copyscape. Prove Your Writing is Your Own… With our free Chrome Extension you can watch a replay of how a document was created. Add to Google Docs Trusted by Industry Leaders A complete suite of QA/QC products Check for Plagiarism Anywhere Conveniently identify plagiarism where you work, in our web app, in Moodle LMS, Google Docs, or Chrome! Plagiarism Checker › The most accurate plagiarism detection (up to 99.5%) for students, writers, teachers, and editors. Industry-leading AI detection for GPT-5.2, Gemini 3, Grok 4.1 Fast and more. Moodle Plugin › Check for plagiarism in essays, papers, and more in Moodle LMS. Chrome Extension › Scan for plagiarism and AI in Google Docs and Chrome. Download Originality.ai for Chrome to unlock plagiarism checks in Google Docs. Install free Chrome Extension Firefox Extension Advanced, Comprehensive, and Precise The Most Accurate Plagiarism Checker At Originality.ai, we created a free online plagiarism checker tool that doesn’t just keep pace — it’s best-in-class. Scan for potential plagiarism in essays, research papers, blogs, articles, and more with up to 99.5% accuracy. Try the most accurate plagiarism checker for free or sign up to check for AI and plagiarism in 1 scan. Best plagiarism checker for complex types of plagiarism Accurate, In-Depth, and Shareable Plagiarism Reports The Originality.ai advanced plagiarism checker excels at detecting complex forms of plagiarism, such as global, paraphrase, patchwork, unintentional, and mosaic plagiarism. The most reliable plagiarism checker tool Streamline your editorial process. Review content for plagiarism before you publish with the industry-leading and most accurate plagiarism checker. Then, sign up to combine plagiarism checking with AI detection. Surpasses competitors at a 5% threshold*: Using advanced machine learning the Originality.ai plagiarism checker can: Identify global plagiarism with 99.5% accuracy. A superior edge over Copyscape at 68.5% accuracy. Detect patchwork plagiarism with 67.5% accuracy. Most accurate of all checkers tested. Comparative Accuracy: Copyscape 30% vs. Grammarly 51% vs. Turnitin 52% *Note: A 5% threshold refers to when 5% or more of the copy matches other sources. Accuracy percentages are approximate and rounded to the nearest whole number. Our unfair advantage Detect Patchwork & Paraphrase Plagiarism Traditional free plagiarism scanners can’t spot subtle plagiarism like patchwork or paraphrasing — but Originality.ai can. Maintain Content Credibility Maintain content integrity and spot issues before publishing or submitting an assignment. User-Friendly Interface Identify plagiarized content in seconds with our user-centered design. Built for ease of use and accessibility on any device. Scans everything in seconds Our plagiarism checker quickly highlights matches. Check blogs, papers, assignments, and more with robust plagiarism detection. Modern Plagiarism Detection Hybrid Plagiarism Checks: Web-Based & Academic or Journal Databases Confidently scan writing with hybrid-plagiarism detection that’s flexible to your use case. Scan publicly available web content through Google search. LMS and Institutional Integrations Extend detection to include academic journal databases and a private data repository. Enable checks for internal papers, student submissions, and institutional archives. Data Privacy & Security Our hybrid plagiarism detector keeps data secure and private. Studies on "Do AI Detectors work?" 3rd Party AI Detection Accuracy Studies Originality.ai was shown to be the most accurate AI detector across multiple published studies. Including the most in depth analysis to date looking at 12 detectors and 11 LLMs. Internal AI Detection Benchmark & Study Our detector was the most accurate across multiple publicly available datasets tested covering blog posts, books, research papers, essays, news, wiki and reviews. We built and open-sourced a testing tool to help others replicate on their own data. Our unfair advantage Why are we most accurate? AI Detectors without an in-depth analysis verified by third party studies should be used with caution. Proven Third-Party Accuracy You don’t just need to take our word for it. Independent third-party studies have also found the Originality.ai AI detector to be exceptionally accurate. Accurate on Latest Models We are constantly testing our AI detection models against the latest flagship models from OpenAI, Anthropic, Meta and other leading LLM providers. Built and Trained on “Adversarial” Datasets We have a full time “Red Team” that is actively testing strategies to make undetectable AI content. Once they find a strategy (such as Paraphrase Plagiarism) that can create high quality undetectable AI generated text and bypass our AI content detector we improve our AI technology and make it detectable. Features of our Plagiarism Checker Best Article, Paper, and Essay Plagiarism Checker Industry-leading plagiarism checks with features built for students, writers, teachers, editors, and more. Maintain authenticity from the classroom to the office. Sentence Highlighting See what sections of the text is plagiarized, and to what extent. Export & Share Reports Prove that your writing is authentic, maintain academic integrity, or journalistic ethics with a shareable plagiarism report. Streamline editing in-app with our fully featured text editor and then scan again. Paraphrasing Detection Advanced machine learning algorithms highlight even subtle instances of plagiarism like patchwork plagiarism, paraphrasing, and more. See a complete history of all scans that you can reference in the future as needed. Download a report showing the most plagiarized sources and the number of matched phrases. Always a step ahead of new developments in AI, machine learning and NLP. Multi-language capabilities Scan non-English text and check for Plagiarism in Google search results for greater certainty of originality across other languages. The Originality.ai Plagiarism Checker is Built For… Marketers, Writers & Editors Check for duplicate text to avoid SEO issues. Avoid potential plagiarism across articles, blogs, and web pages. Publish with confidence, and get peace of mind that your content is original and unique. Uphold editorial or journalistic integrity across your team. Students & Teachers Peace of mind for students: easily check for plagiarism in essays, papers, and assignments before you click submit. Review matching text with our paper checker. Then, double-check your bibliography for proper citations. Teachers: streamline assignment review with AI and plagiarism checks in Moodle LMS. The most accurate AI and plagiarism checker for Chrome and Google Docs . Schools & Enterprise

Streamline AI and plagiarism checks throughout your school or organization. Maintain editorial and academic integrity. Implement AI detection and plagiarism checks at scale. Stay on the same page with shareable AI and plagiarism reports. Integrations: Extensions & Plugins Seamlessly integrate our AI Checker into your favorite platforms like Chrome, Moodle and more. Check for AI use without skipping a beat. Chrome extensions How to use Originality.ai Paste or Upload Text Login to Originality.ai and paste your text into the editor. You may also upload a PDF or enter a URL for scanning. Select Scan Types Select your desired scan types like AI, Plagiarism, Content Quality, Readability, Grammar OR Fact checker to scan your text against. Click on the Scan button and get scores for each scan types with detailed explanations and sentence highlights wherever applicable. Flexible Pricing Protect your reputation & improve your content quality by accurately detecting plagiarized content and artificially generated text. ClickingPublish.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. Customers love Originality.ai Originality is a great tool for detecting AI content. The product has been invaluable for our content marketing team . Fernanda and the team are always very responsive and helpful. Highly recommend this product. Miguel Maloney Thompson I have the opportunity to make sure that my writing is plagiarism-free , and with a lot of AI-generated content around, I can ensure my writing does not get flagged as just another to the bunch. I do technical writing where there are only so many ways to describe concepts and ideas. However, Originality.ai gives me the opportunity to personalize my writing even more , which is an advantage. With some time, I can give my content a sense of uniqueness. Reliable and trustworthy . Originality is always so quick to respond to my questions and lend a helping hand. It’s a very good tool for detecting ChatGPT use on academic papers, especially with the "view writing" feature which shows the text being typed by the student as they were typing it. AI is accurate compared to free choices and the support staff like Ellie are very helpful. The interface is easy to use and shows a % chance of the work being AI . It’s also, nice that it shows what parts may be AI or not. The service provided is exceptional, offering the most accurate and reliable AI detector available on the market . The customer support team is exceptionally responsive. Originality's AI checker and plagiarism detector are absolutely phenomenal —by far the best I have used (yes, I used all of Winston, GPT zero, etc.). The Turbo model is CRAZY good! There are lots of similar AI detection tools available online but nothing comes even close to what they offer . I can't trust any other tools other than theirs. Have tried maybe 20-30 other websites and settled with them. I had an excellent experience with the support team at Originality.ai. They were incredibly responsive and provided clear, detailed answers to all my questions. The explanations were thorough, and I now have a much better understanding of how the platform works and how my content is handled. The team was patient and professional and went above and beyond to ensure all my concerns were addressed . I truly appreciate their help and the top-notch customer service they provide. Highly recommended! Canadian Law Student Originality.ai is the best tool on the market . I have used comparable services and this one is exceptional. It provides an accurate report with a match score which really helps writers/researchers adjust and improve their work. There are also advanced features such as paraphrase detection which are not available with any other comparable service. The features provided by Originality.ai are exceptional for users who want to avoid plagiarism and also improve their research process . I hope to continue using Originality.ai for many years to come. This is a really helpful tool. Certainly the best of the AI detectors I tried. What makes it great is that you also get a bunch of other tools that are really helpful. The fact checker is awesome , it gives you feedback on whether or not points in your essay are factual or not by reading the source material in your citations. I have been using this tool since the start! And it has saved me many times . Many times when checking clients' sites the problem was AI content or plagiarism. When I hire writers, I want 100% human-written content. I depend upon Originality.ai to check this for me . Originality.ai saved me from making a big mistake. I have written a book with the help of ChatGPT, 40% of my work is AI; 60% is human. It identified the AI, and now I am writing it all by myself. 88-100% human. Thank you Originality.ai . I started to look for an easy tool to confirm my suspicions over some of the material being submitted by my students in first-year Communication courses. I found Originality.ai and tried it out. It worked so well that I actually tested it out with some material I created using AI as an example and sure enough, it perfectly determined which was my work, what was totally AI-written, and what was edited AI material . Andrew Stevenson Originality.ai has been remarkable in its ability to detect AI content . The customer service is also incredible in how thorough and responsive they are. Highly recommend this program. Pieter Steenkamp I found Originality.ai to be the best AI detector. I use it for my student's assignments and recommend it to my colleagues. Originality really lives up to the expectations, it's super reliable and has the best detector for AI. Now I can understand why so many people use it such as professionals. Incredible experience. Excellent product. Very easy to use, thorough and informative. Brady was incredibly helpful on the chat. He carefully checked my document to see why it had a high score for AI and then explained it to me. He provided individualized advice on how to move forward. Excellent! Thank you Brady. Customer service is top-notch. Not only are they super accommodating, they are also super helpful. The tools on Originality.ai are also incredibly accurate and very useful. I've had nothing but positive experiences using this service. Originality.ai is by far the best AI detector tool . We have used other tools to detect AI in content but we have found that Originality.ai is by far the most accurate. This, combined with flexible payment plans to suit individual requirements and sharp customer support. Originality.ai is a no-brainer if you are looking for an AI detection solution. Featured by Leading Publications How companies are embracing generative AI for employees…or not Many prominent companies have entirely blocked internal ChatGPT use, including JPMorgan Chase , Northrup Grumman, Apple, Verizon, Spotify and Accenture, according to AI content detector Originality.AI, with several citing privacy and security concerns. Ben Schreckinger AI vs. public opinion Originality.ai, a site that provides detection services for AI-generated content and plagiarism, published a convenient tracker that lists the 10 pending lawsuits against OpenAI and ChatGPT. Mushroom pickers urged to avoid foraging books on Amazon that appear to be written by AI Four samples from the books were examined for the Guardian by Originality.ai, a US firm that detects AI content. Steven Lee Myers & Tiffany Hsu Another Side of the A.I. Boom: Detecting What A.I. Makes More than a dozen companies have popped up to offer services aimed at identifying whether photos, text and videos are made by humans or machines. Generative AI: hype not hyperintelligence is lifting values Generative artificial intelligence could produce magic in the sky , says Sam Altman founder of pioneering start-up OpenAI. Successful entrepreneurs are entitled to make visionary statements. Major websites are blocking AI crawlers from accessing their content Nearly 20% of the top 1000 websites in the world are blocking crawler bots that gather web data for AI services, according to new data from Originality.AI , an AI content detector. Andrea Taloni, Vincenzo Scorcia, and Giuseppe Giannaccare Modern threats in academia: evaluating plagiarism and artificial intelligence detection scores of ChatGPT Plagiarism and research integrity are sensitive issues in the academic setting, especially after the recent offspring of artificial intelligence (AI) and large language models (LLMs) such as GPT-4.0 [1] . Why publishers are questioning the effectiveness of blocking AI web crawlers A number of publishers — including Bloomberg and The New York Times — were quick to block OpenAI’s web crawler from accessing their sites , to protect their content from getting scraped and used to feed the artificial intelligence tech company’s large language models (LLMs). Frequently Asked Questions What is the best plagiarism checker? Are you wondering, ‘What is the most accurate plagiarism checker?’ — Originality.ai offers the best plagiarism checker with up to 99.5% accuracy in identifying global plagiarism, 41% accuracy in detecting paraphrase plagiarism, and up to 67.5% accuracy in detecting patchwork plagiarism. Originality.ai is the most accurate of all plagiarism checkers tested. For a complete analysis of comparative accuracy to competitors, visit our Plagiarism Accuracy Study (as a quick snapshot of comparative accuracy for patchwork plagiarism: Copyscape 30% vs. Grammarly 51% vs. Turnitin 52%). Is the Originality.ai plagiarism detector suitable for students and teachers? The Originality.ai plagiarism detector is an excellent choice for educators, teachers, and academic institutions. At Originality.ai, we offer a dual, hybrid approach to plagiarism checks that provides context-specific detection for individuals and educational institutions. Why is Originality.ai an excellent choice for teachers? Advanced Moodle LMS Plugin integration: check for plagiarism and AI writing directly in the Moodle LMS. Academic journal and publication database integrations for more comprehensive plagiarism detection for LMS. Private Data Repositories for Institutions and LMS platforms, allowing schools and universities to securely scan against their own internal papers and student submissions. It’s also important to note that a plagiarism checker report should not be used as the only measure to identify academic cheating. How does the Originality.ai Plagiarism Checker work? We’ve upgraded our best-in-class plagiarism checker to offer hybrid plagiarism detection. Discover a plagiarism checker that adapts seamlessly to your use case: For web app users: The plagiarism checker scans publicly available web content through Google search to identify potential matches and instances of copied or paraphrased text. For LMS and institutional integrations: The system extends detection capabilities to include academic journal databases and a private data repository, enabling plagiarism checks against internal papers, student submissions, and institutional archives. This dual approach ensures that both individual users and institutions get accurate, context-specific plagiarism detection while maintaining full data privacy and security. Does Originality.ai offer an AI plagiarism checker? With the rise of AI content in Google , combining plagiarism and AI detection is becoming increasingly important. Complement plagiarism detection with the Originality.ai AI Detector to find instances of AI-generated text plagiarism. Sign up to try the best plagiarism checker for AI and complex types of plagiarism today! Then, learn about the efficacy of plagiarism detection in our Plagiarism Checker Accuracy Study and AI detectors in our AI Detector Accuracy Review and a Meta-Analysis of Third-Party AI Detection Studies . Are plagiarism detectors beneficial for marketers? Originality.ai is the most reliable plagiarism detector for content marketers, digital marketers, and web publishers. Identify potential instances of plagiarism in content so you can publish with confidence. What other tools does Originality.ai offer for students? As well as the most accurate essay and paper plagiarism checker, Originality.ai also offers a Free Essay Checker to give students quick tips on how to improve essay writing. Plus, check out Originality.ai for Chrome to demonstrate proof of authorship and check for plagiarism or AI text in Google Docs. AI & Plagiarism Detector for Serious Content Publishers Originality.ai 64 Hurontario St Collingwood, Ontario L9Y 2L6 © 0000 Originality.ai