Originality.ai
AI content detection, plagiarism and fact checking for publishers and educators
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Pricing
Free · from $12.95/mo
API
Yes
Platforms
What is Originality.ai?
Originality.ai is an AI content detector that checks whether text was written by large language models such as GPT, Claude, Gemini, Kimi and DeepSeek. Each scan shows how much of the text is likely AI, likely original or mixed, and highlights results sentence by sentence. The company says the detector was trained on adversarial data so it can catch text that was paraphrased with AI.
Besides AI detection, the platform includes a plagiarism checker and tools for fact and hallucination checks, grammar, readability, guideline compliance and a content quality score. Deep Scan suggests edits, and Writing Replay shows how a document was written.
It works on the web and through Chrome and Firefox extensions, Google Docs, Google Classroom, Moodle, an API and MCP. It is aimed at students, teachers, content agencies, publishers and enterprise teams. Pricing is credit-based: a free tier, then Pro and Enterprise subscriptions.
Key features
- AI text detection with sentence-level highlights
- Plagiarism checker
- Fact and AI hallucination checker
- Grammar and readability checkers
- Bulk Scan for many documents
- Writing Replay showing how a document was written
- Deep Scan editing suggestions
- Shareable reports and PDF downloads
Use cases
Who it's for
Checking freelance content
Agencies and publishers can scan submitted articles for AI generation and plagiarism before they publish them.
Classroom integrity
Teachers can check student work through the Google Classroom and Moodle integrations or the browser extensions.
Fact-checking drafts
Editors can run the fact and hallucination checker to flag claims that may be wrong in AI-assisted drafts.
High-volume scanning
Enterprise teams can use the API or Bulk Scan to check large amounts of content.
Originality.ai pricing
From the vendor's site, checked Oct 26, 2026; we re-check prices monthly. Prices change — confirm on their pricing page.
Free
no subscription
Free
- Limited free credits
- AI, plagiarism, grammar and readability checks
- Fact and hallucination checks
Pro
month
$14.95/mo, or $12.95/mo billed yearly ($155.40/yr)
- 2,000 credits (200K words) per month
- Deep Scan and Bulk Scan
- File upload, PDF reports, team management
Enterprise
month
$179/mo, or $136.58/mo billed yearly ($1,638.96/yr)
- 15,000 credits (1.5M words) per month
- API access
- Priority support, 1-year scan history
What the free plan gets you
- 10K words (100 credits one time)
- 60 credits (3 scans/day)
- 1 credit = 100 words
$0.065 per 1,000 words processed on the Pro (billed yearly) plan ($12.95/mo ÷ 200 1,000 wordss).
Which plan do you need?
- Hemingway EditorIndividual 5K$8.33/mo
- Originality.aiPro$12.95/mo
- Copyleaks AI DetectorPersonal$13.99/mo
The cheapest paid plan with a published price that fits; a plan counts for a volume only if it states how much it includes. Custom and sales-quoted plans aren't included.
How Originality.ai compares
- Originality.ai has a free plan, like 3 of the 4 alternatives below.
- It offers an API, which only 2 of the others do.
| Tool | Starts at | Free plan | Free trial | API | Open source | |
|---|---|---|---|---|---|---|
| OOriginality.ai | $12.95/mo | — | — | |||
| G | — | — | — | Originality.ai vs GPTZero | ||
C Copyleaks AI Detector | $13.99/mo | — | Originality.ai vs Copyleaks AI Detector | |||
| G | — | — | — | Originality.ai vs Grammarly | ||
H Hemingway Editor | $8.33/mo | — | — | — | Originality.ai vs Hemingway Editor |
Compare 6 capabilities
| Capability | Originality.ai | GPTZero |
|---|---|---|
| Sentence-level highlights | — | |
| Plagiarism checker | ||
| Writing replay | ||
| Bulk processing | — | |
| Shareable reports | — | |
| Docs/LMS integration |
Capabilities as stated on each vendor's own site; — means the site doesn't say. The closest alternatives in our directory by category. “Starts at” is the cheapest paid plan per month, as each vendor lists it.
Originality.ai data and privacy
Trains AI on your content
Yes, unless you opt out
“Unless you opt out, we may use your scan history and scan results to help train and improve our models.”
Data retention
Scan history kept 30 days (Pro) or 365 days (Enterprise)
“While “Pro” or “Pay As You Go” subscribers can access scanned history for 30 days, “Enterprise” subscribers can access it for 365 days.”
Where data is stored
Not stated
Security and compliance
None stated
From Originality.ai's own privacy and security pages , checked Oct 28, 2026. We only show what the vendor states in writing; “not stated” means the pages don't say.
Who's behind Originality.ai
- Company
- Originality AI Inc.
- Based in
- Collingwood, Canada
- Founded
- 2022
- Founders
- Jon Gillham
“Originality.ai launched in November 2022 to be able to detect GPT-3 generated content”
“Jon Gillham founded Originality.ai after selling a content marketing agency he had previously founded.”
From Originality.ai's own about, terms and privacy pages, checked Oct 28, 2026.
Pros and cons
Strengths
- Free tier includes AI, plagiarism, grammar and fact checks
- Pro plan starts at $12.95/mo billed yearly
- Integrations for Chrome, Firefox, Google Docs, Moodle and Google Classroom
- Detects text that was paraphrased with AI
Limitations
- API access only on the $179/mo Enterprise plan
- Credit-based usage: 1 credit equals 100 words
- Pricing page gives conflicting details on free credits and Pro scan history
Originality.ai FAQ
Is there a free plan?
Yes. The Free plan needs no subscription and includes limited credits for AI, plagiarism, grammar and other checks.
How much does Pro cost?
$14.95 per month, or $12.95 per month billed yearly ($155.40), for 2,000 credits (200K words) per month.
Is there an API?
Yes, there is a developer API documented at docs.originality.ai. It is included in the Enterprise plan.
Which integrations are available?
Chrome and Firefox extensions, Google Docs, Google Classroom, Moodle, the API and MCP.
How do credits work?
One credit covers 100 words. Paid plan credits renew monthly, and purchased credits expire two years after purchase.
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Originality.ai
Free · from $12.95/mo
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