Overview

Originality.ai is a web, browser-extension, and API toolkit for checking AI-generated text, plagiarism, facts, readability, grammar, and content quality. It suits website owners, content marketers, writers, publishers, and educators who need more than a standalone AI detector. Its breadth is useful, but detection results are estimates—not proof—and short API submissions need particular caution.

Key features

The AI detector offers configurable allowances of 0%, 5%, 15%, 25%, or 40%, giving users a way to set the tolerance used in detection. The free option allows three scans per day, up to 2,000 words each, but it is AI detection only; broader checks require a paid plan.

For site teams, the scanner can crawl a whole website, flag pages likely to contain AI-generated content, and schedule recurring scans. That makes it more relevant to publishers reviewing large libraries than to someone checking an occasional paragraph. The browser extension scans Google Docs, web pages, or selected text, and adds writing replay, typing-behavior insights, and shareable reports.

Other checks include plagiarism, fact checking, readability, grammar and spelling, and content quality. A Moodle integration lets educators review submitted work for AI-generated text and plagiarism within Moodle. The REST-based API submits text for AI or plagiarism scanning and returns detailed results; the maker says AI detection supports 30 languages. API AI scans require at least 50 words, and accuracy decreases below 100 words, so very short passages are a poor fit.

Text is protected with TLS 1.2 or higher and 256-bit encryption. Users can opt out of AI training-data use and delete scan history. The privacy policy covers data processed through the website, app, Chrome extension, API, Moodle plugin, and educational integrations.

Pricing

Basic: 0.00 USD per free, with no subscription required. It provides AI detection only, three scans per day, up to 2,000 words per scan, and DOCX, PDF, and DOC uploads. This is a practical way to check occasional documents, but it does not include the wider toolset.

Pro: 12.95 USD per month, billed yearly at $155.4 ($12.95 x 12 months), or $14.95/month with the monthly option. It includes 2,000 credits each month, with one credit per 100 words; credits expire monthly. Chrome extension access and standard support are included. Additional team seats are $8.62/month annually or $9.95/month monthly. Pro fits regular individual use or smaller teams that want extension-based checks, though its monthly credit allowance makes ongoing volume important to track. Pro support issues are typically resolved within 24 hours or less.

Enterprise: 136.58 USD per month, billed yearly at $1638.96 ($136.58 x 12 months), or $179/month with the monthly option. It includes 15,000 monthly credits at one credit per 100 words, which expire monthly, plus priority support, 365-day scan history, and API access. Additional team seats are $19.04/month annually. This is the clearest fit for higher-volume organizations that need API access and longer scan history; priority support issues are typically resolved within an hour or less.

Platforms

Originality.ai is available on the web, as a browser extension, and through an API. The extension works with Google Docs, web pages, and selected text; Moodle integration supports review of submitted work within that learning platform.

Who it's for

Website owners and publishers can use site-wide crawling and scheduled scans to review content libraries. Writers and content marketers may value the combination of AI, plagiarism, fact, readability, grammar, and quality checks. Educators can use Moodle integration for submissions, while developers and larger organizations can use the API. It is less suited to decisions that require definitive proof of AI authorship: the company’s terms describe results as probabilistic estimates that can produce false positives or false negatives.

Pros and cons

Pros: A broad set of checks goes beyond AI detection, including plagiarism, fact checking, readability, grammar, spelling, and content quality.
Pros: Whole-site crawling and scheduled scans address recurring review needs across a website, rather than only one-off text checks.
Pros: API, extension, and Moodle options accommodate developer, browser, and educational workflows.
Cons: Basic is limited to AI detection, with three daily scans of up to 2,000 words each.
Cons: Paid credits expire monthly, so unused Pro or Enterprise allowance does not carry forward.
Cons: API detection requires at least 50 words, with accuracy decreasing below 100 words; estimates also cannot serve as conclusive evidence.

Alternatives

Consider GPTZero if its free allowance of 10,000 words per month and 50,000 characters better suits your volume; it also offers a free plan, free trial, and web, extension, and API access. AI Detectors.io is another freemium option, with web, extension, macOS, Windows, and API platforms. Choose Pangram if its free plan’s 2,000 words per day, image scans, OCR, and Google Docs integration match your workflow. Winston AI offers a free 14-day trial with 2,000 credits, plus image detection and document and OCR scanning. Copyleaks AI Detector is an alternative with AI and plagiarism detection and 30+ AI-detection languages. It's AI has a free plan with 4,000 words, file upload, and a Chrome extension. TrustOriginality.ai offers a web-based free plan with one text analysis per month. Proofademic offers a free plan with multilingual AI detection, plagiarism checking, and report export.

For broader category comparisons, browse AI Content Detectors, AI Detection Software, or AI Content Detection Software. For plagiarism-focused tools, see Plagiarism Detection Software and Plagiarism Checkers; for broader content tools, see Content Optimization Software.

Verdict

Originality.ai is best for publishers, content teams, and educators who want AI detection alongside other content checks and need website, extension, or API workflows. Its site scanning and breadth make it more capable than a single-purpose detector, but monthly credit expiry and probabilistic results matter. Look elsewhere if you need AI detection to function as proof, or if the free plan’s limited scan count and scope are not enough.

	Originality.ai	Viper
Free plan	Yes	No
Free trial	No	No
Paid from	$12.95/mo	—
Open source	No	No
Platforms	api, extension, Web	Web
Free plan	Yes	No
Paid from	12.95 /mo	—
Word limit	10,000 words	—
API access	Yes	Yes

Originality.ai vs Viper

Originality.ai

Viper