What Originality.ai does
Originality.ai is a content-checking service that scores text for signs of AI writing and checks it for plagiarism in one scan. It also offers fact and hallucination checking, readability, grammar and guideline checks, and a Deep Scan that explains why passages were flagged. Publishers, agencies, editors and teachers use it to review submitted work. It is priced by credits, where one credit covers 100 words, and it detects text from recent models including GPT, Claude, Gemini and DeepSeek.
Best for
- Publishers and agencies reviewing freelance writing
- Editors who need AI and plagiarism checks in one pass
- Teachers checking student work in Google Docs or Google Classroom
- Developers adding detection through an API (Enterprise)
Key features
AI detection
Scores how likely text is AI-written, and says it is trained on paraphrased text from tools like Quillbot.
Plagiarism checker
Checks text against the web for copied passages; a combined AI and plagiarism scan uses 2 credits per 100 words.
Deep Scan
On paid plans, explains which parts were flagged and why, and suggests how to edit them.
Fact and hallucination checker
Flags claims that may be wrong, alongside readability, grammar and content-quality checks.
Writing replay extension
A Chrome extension replays how a document was written in Google Docs; full features need a paid plan.
Bulk scan and reports
Pro adds bulk scanning, file uploads (docx, pdf, doc) and shareable reports.
Originality.ai pricing
Originality.ai has a free plan. A free account gets a limited number of scan credits; the pricing page lists both 100 one-time credits and 60 daily credits (3 scans a day), so the exact allowance is unclear. Paid plans start at $14.95/month. 1 credit = 100 words. Monthly subscription credits expire at the end of each month; pay-as-you-go credits expire 2 years after purchase. Extra team seats cost $9.95/month on Pro. Prices checked on the official site on Nov 9, 2026.
| Free | $0 | |
|---|---|---|
| Pro | $14.95/month | $12.95/month billed yearly; 2,000 credits (200K words) a month |
| Enterprise | $179/month | $136.58/month billed yearly; 15,000 credits a month, API access |
Source: Originality.ai pricing page
Pros and cons
What it does well
- AI detection, plagiarism and fact checking run from one scan.
- Deep Scan explains why text was flagged instead of only giving a score.
- Integrates with Chrome, Firefox, Google Classroom, Moodle and an API.
Know before you sign up
- Unused monthly subscription credits expire at the end of each month.
- API access is only on the Enterprise plan.
- The company warns results on texts under 100 words are less accurate and should not be the sole basis for academic discipline.
Alternatives to Originality.ai
GPTZeroReview writing for possible AI-generated text.
Undetectable AIRewrite and review AI-assisted text.
CopyleaksCheck text for possible AI generation.
DeepLTranslate text and documents across languages.
GrammarlyCheck writing, tone, and clarity across your work.
Hemingway EditorSpot readability issues and revise prose.
Questions about Originality.ai
What is Originality.ai?
Originality.ai is a content-checking service that scores text for signs of AI writing and checks it for plagiarism in one scan. It also offers fact and hallucination checking, readability, grammar and guideline checks, and a Deep Scan that explains why passages were flagged. Publishers, agencies, editors and teachers use it to review submitted work. It is priced by credits, where one credit covers 100 words, and it detects text from recent models including GPT, Claude, Gemini and DeepSeek.
Is Originality.ai free?
Originality.ai has a free plan. A free account gets a limited number of scan credits; the pricing page lists both 100 one-time credits and 60 daily credits (3 scans a day), so the exact allowance is unclear. Paid plans start at $14.95/month. 1 credit = 100 words. Monthly subscription credits expire at the end of each month; pay-as-you-go credits expire 2 years after purchase. Extra team seats cost $9.95/month on Pro. Prices checked on the official site on Nov 9, 2026.
How much does Originality.ai cost?
Paid plans start at $14.95/month; plans listed on the official pricing page: Free ($0), Pro ($14.95/month), Enterprise ($179/month). 1 credit = 100 words. Monthly subscription credits expire at the end of each month; pay-as-you-go credits expire 2 years after purchase. Extra team seats cost $9.95/month on Pro.
Who is Originality.ai best for?
Publishers and agencies reviewing freelance writing, Editors who need AI and plagiarism checks in one pass, Teachers checking student work in Google Docs or Google Classroom and Developers adding detection through an API (Enterprise).
Where can I use Originality.ai?
Originality.ai is available on Web, Chrome extension and API, according to its official site.
What are some alternatives to Originality.ai?
Similar writing tools include GPTZero, Undetectable AI, Copyleaks and DeepL. Compare them on the Writing page.