Plagiarism Checker Grammar Checker Content Quality Guideline Checker Readability Checker AI Detector By Originality.ai™ is the Most Accurate AI Detector in third-party studies . Check up to 2,000 words with 3 Free AI Scans Per Day. AI Detection in Chrome & Google Docs Check for AI and plagiarism. Plus, watch a writing replay to prove authorship. Originality.ai Chrome Extension How to use Originality.ai? Paste, Upload, or URL AI Allowance, Plagiarism, Content Quality, and more See scores for each selected scan. Then, adjust AI Allowance or try Deep Scan . Proven AI Detection Accuracy Third-Party AI Studies Originality.ai has proven accuracy in multiple, peer-reviewed third party studies. Originality.ai AI Studies Accuracy metrics for our latest AI detection models: AI Accuracy Study Accuracy on the Latest LLMs: GPT-6 Astra (Sol, Luna, Terra), GPT 5.5 , Claude Fable 5 , Gemini 3 , Kimi K3 , DeepSeek V4 (Flash & Pro), Grok 4.1 Fast , Llama 4 Maverick & Scout , and more Trained on “Adversarial Data” Detect AI Paraphrasing Our team actively tests AI tools that change, modify, or edit text (e.g. Quillbot or Grammarly) and continuously improves our AI detector to ensure attempts to hide AI-altered text are still detectable. 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 Google Classroom Firefox Extension Manage False Positives Check for AI and plagiarism with the Originality.ai Chrome Extension. Peace of mind for writers and students to show the authorship of writing, with a Writing Replay. Add AI Checker Chrome Extension Features for Enterprise & Education API, Security & Privacy Built for the unique needs of enterprise, high-volume web publishers, agencies, and schools. A reliable, Fast, AI Detection API your developers will love. QA/QC Solution for Teams Assign team roles and access full features from AI scans to content quality checks. Text Encryption TLS 1.2 or higher, with end-to-end military grade 256 bit industry-standard encryption. Training Data is Optional Opt-out of AI training data use and delete scan history in 1 click. Features for Students & Writers Show Your Work is Original Accurately identify AI content, fix accidental plagiarism, and share reports to show writing is original. Choose how much AI you allow. AI detection that adapts to your hybrid-content workflow. See why text is likely flagged as AI and how to ethically edit it, so it sounds more natural. Sentence Highlights See which sentences are most likely AI with highlights. Easily access scan history, get a shareable report link, or download a shareable PDF report. Originality.ai is Built for... Writers, Editors & Marketers Publish readable , quality content Show writing in Google Docs Review facts and plagiarism Bulk Scan to scale checks Teachers & Students Moodle Plugin & Google Classroom AI Allowance : flexible AI detection See authorship: Chrome Extension Deep Scan : ethically edit text that sounds like AI Enterprise & Schools Manage teams and assign roles Scale AI, plagiarism, and fact checks Support learning and AI transparency Enterprise pricing plans Industry-standard security Flexible Pricing Discover flexible pricing for students, teachers, small teams, agencies, publishers, and enterprise. Originality.ai Pricing 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. 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 Is the Originality.ai AI detector free? Is Originality.ai free, or is there a free Originality trial? We don’t offer a free trial of Originality.ai. Instead, we offer a limited free AI detection tool, with 3 free daily scans. What Can Cause False Positives? Tools that use AI to rewrite or edit copy (e.g., some Grammarly features ) can cause false positives. Shorter text may impact accuracy; we have a 100-word minimum at Originality.ai. Classic Model: An AI detection score of 60% Likely Original and 40% Likely AI is not a false positive. It correctly predicted with 60% confidence that your content was Likely Original. AI Allowance scans (new): Align how much AI you allow with project guidelines. How Can I Show My Work or Assignment is Original? An AI score shouldn’t be used alone for academic integrity discipline. Students and Writers: Share accuracy studies and show your writing process with our Chrome Extension . Can I See Previous Scans? Yes, scan history is stored for later retrieval or sharing. Complete removal of your account and data is available upon request. What Languages Does Originality.ai AI Detection Support? With Originality.ai, you can check if text is written by AI in 30 languages, with an overall accuracy of 97.8% for our multilingual model. Multilingual AI Accuracy Study . Do Credits Expire? Yes, per our Terms and Conditions , credits expire 2 years from the date of purchase. How many free AI scans are there? Check up to 2,000 words with the free AI checker, and run up to 3 free AI scans daily. To scan more words, upgrade to premium . Do I need an account to run a free AI scan? No, you can run up to 3 free AI scans daily without an account. To scan more words and run additional scans, you can conveniently sign up for Originality.ai . Is my pasted text stored, shared, or used for training? Text input into the free AI detector may be used for training. Users with an Originality.ai account can opt out of data use for AI training. What does the AI score mean? AI scores are predictions (probabilities) on whether text is AI-generated or Original (human-written). At Originality.ai, we emphasize that AI scores reflect probability, not guilt. If you select AI Allowance, you choose how much AI you allow. So, your AI score reflects whether the percentage of AI writing is likely more or less than your selection. Should an AI score be used on its own? Use an AI score as one signal, not a final decision. Review other details like writing history and drafts before any high-consequence decisions. Always keep a human reviewer in the loop. How does the Originality.ai AI detector work? The Originality.ai AI Checker is based on a modified version of the BERT model and forms part of our patented all-in-one text analysis and verification system (U.S. Patent No. 12,253,988). For in-depth details on training, fine-tuning, and more, check out this blog post and this post to learn about our patented technology. Does Originality.ai Detect AI Paraphrasing? Originality.ai is accurate at detecting AI-paraphrased content (e.g., Quillbot ). If you permit AI paraphrasing, adjust how much you allow with AI Allowance; read more in our accuracy study . What Are AI Detection False Positives? AI Detection false positives happen when human writing is incorrectly classified as AI-generated. At Originality.ai, we transparently share false positive rates in our accuracy study . Note: False positive rates can vary by AI detection model and brand. AI & Plagiarism Detector for Serious Content Publishers Originality.ai 64 Hurontario St Collingwood, Ontario L9Y 2L6 © 0000 Originality.ai We use necessary cookies to make our website and its core functionalities work. We use cookies to personalise content and ads, to provide social media features, and to analyse our traffic. We also share information about your use of our site with our social media, advertising, and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services.