Free trial
A free scan runs on the homepage without an account, but the site does not describe a time limited free trial of the paid plans. Unlimited scans and the wider set of checks require a paid upgrade.
Learn moreOriginality
AI detection and content quality checks for text you did not write yourself
Beginner API
What is Originality?
Originality is an AI checker tool. Originality.ai is an AI detector and content integrity suite that scores text for likely AI authorship, then layers on plagiarism, readability, grammar, fact checking and content quality checks. It offers a free scan, a Chrome extension, a Moodle plugin and an API, and publishes accuracy studies against current LLMs.
Originality.ai is an AI detector built around a single question: how much of a given piece of text was produced by a large language model? The homepage positions its detector as the most accurate in third-party studies, and the company publishes accuracy work covering current models including GPT-6 Astra, Claude Opus 5.5, Gemini 4 Argon, Kimi K3, DeepSeek V4, Grok 4.7 and Llama 4. A free scan accepts pasted text, an uploaded .docx or .txt file, or a URL, and returns a percentage split between text that is likely AI and text that is likely original, with an original, mixed or AI band. The product is aimed at people who have to make a judgement about authorship: editors and publishers reviewing submissions, SEO and content teams auditing pages, educators checking student work, and agencies vetting freelance writers. In practice a scan is not a single verdict. Users choose which checks to run alongside AI detection, including plagiarism, readability, grammar, a content quality score, an automated fact checker and a hallucination checker, then read the scores together. A Deep Scan mode offers suggestions for revising text and rescanning, which fits the common workflow of using the detector as a drafting aid rather than a final gate. The site is candid that detectors make mistakes and that a score should be treated as a signal for review, not proof of authorship or misconduct. That framing matters when the output could affect a grade, a contract or a reputation. The detector is also trained on adversarial data, meaning the team tests paraphrasing and rewriting tools such as Quillbot and Grammarly so that edited AI text remains detectable. Where it fits: Originality.ai is a broader content integrity suite than single purpose AI checkers, and it reaches users inside the tools they already work in through a Chrome extension for the web and Google Docs, a Moodle plugin and an API. A free tier exists for occasional checks, while unlimited scanning and the full set of checks sit behind paid plans.
How do you use Originality?
1Run a free scan
Paste text, upload a .docx or .txt file, or point the tool at a URL on the homepage. The free scan returns a percentage of text likely written by AI and a percentage likely original.
2Create an account for full scans
Sign up to move beyond the free allowance and unlock the additional checks that run alongside AI detection. The signup page handles login for returning users too.
3Choose which checks to run
Select AI detection plus any combination of plagiarism, readability, content quality, grammar and fact checking before scanning. Running several checks together gives a fuller picture than the AI score alone.4Review the scores
Read the AI versus original split and the other results side by side, keeping in mind that the score is a review signal rather than proof. Cross check borderline cases before acting on them.5Apply Deep Scan and rescan
Use the Deep Scan suggestions to revise flagged passages, then scan the revised text again. Repeating the cycle is how the detector works as an editing aid rather than a one off verdict.
6Add the Chrome extension
Install the extension to run AI and plagiarism checks directly in the browser or in Google Docs, and to keep a writing replay that can support authorship claims.
Pros and cons
Pros
- Free scan accepts pasted text, uploaded .docx or .txt files and URLs, so a first check needs no accountAI
- Bundles plagiarism, readability, grammar, fact checking and content quality alongside AI detectionAI
- Chrome extension brings AI and plagiarism checks into the browser and Google DocsAI
- Publishes accuracy studies and claims third-party validation across current models such as GPT-6 and Gemini 4AI
- Explicitly frames scores as a review signal rather than proof of misconduct, which is the honest framingAI
Cons
- The homepage shows no plan prices, credit allowances or limits, so cost has to be checked on the pricing page before committingAI
- Detection depends on the model and the editing applied; the site's own model list keeps growing, so accuracy against any single LLM needs periodic retestingAI
- Free scanning is capped and unlimited scans sit behind the paid tier, which rules out high volume free useAI
- The Moodle plugin and Chrome extension cover specific environments only; other learning systems and editors are not addressed on the homepageAI
- Multiple scores (AI, plagiarism, quality, facts) can be hard to reconcile into one decision without a documented internal policyAI
How much does Originality cost?
Support
Support details are not described on the homepage. The site links to a documentation hub and to a large blog covering detection method, score interpretation and false positive guidance.
Learn moreIntegrations
A Chrome extension covers the browser and Google Docs, a Moodle plugin targets course workflows, and a documented API lets teams run checks from their own systems.
Learn moreFeatures
Core AI detection with model specific accuracy claims, plus Deep Scan revision tips, plagiarism checking, readability and grammar checks, a content quality score, an automated fact checker and a hallucination checker. Bulk scanning, a Chrome extension for the web and Google Docs, a Moodle plugin and a documented API extend the same checks to higher volume and institutional use.
Learn moreFrequently asked questions about Originality
Does Originality offer a free trial?
A free scan runs on the homepage without an account, but the site does not describe a time limited free trial of the paid plans. Unlimited scans and the wider set of checks require a paid upgrade.Does Originality have an API?
Yes, Originality offers an API.How do you use Originality?
The walkthrough on this page covers 6 steps: 1. Run a free scan 2. Create an account for full scans 3. Choose which checks to run 4. Review the scores 5. Apply Deep Scan and rescan 6. Add the Chrome extension.What platforms does Originality support?
Originality is available on Web App and Browser extension.What does Originality integrate with?
A Chrome extension covers the browser and Google Docs, a Moodle plugin targets course workflows, and a documented API lets teams run checks from their own systems.What are the limitations of Originality?
The homepage shows no plan prices, credit allowances or limits, so cost has to be checked on the pricing page before committing. Detection depends on the model and the editing applied; the site's own model list keeps growing, so accuracy against any single LLM needs periodic retesting. Free scanning is capped and unlimited scans sit behind the paid tier, which rules out high volume free use.
Status
StatusActive
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Added10/21/2026
Platforms
Web AppBrowser extension
Pricing
FreeFreemiumSubscription
