VerlumoAIWriting assistant that checks grammar, tone, and clarity.
View detailsCopyleaks
Plagiarism and AI-content detection platform for schools, publishers, and businesses.
Copyleaks is a content integrity platform that checks text for plagiarism and AI-generated content. It scans against billions of web pages and academic sources, and its AI detector identifies text likely written by AI models, including paraphrased and translated content.
Key Features
- AI text detection across many languages
- Plagiarism checking against web and academic sources
- AI image detection
- Browser extension and Google Docs add-on
- API for automated screening
- Detailed similarity and AI reports
Pricing
| Plan | Price | Details |
|---|---|---|
| Free trial | $0 | A limited number of free scans to test the AI and plagiarism detection tools, no card required. |
| Personal | $16.99/mo | $13.99 per month on annual billing ($167.88 a year). 100 credits a month, about 25,000 words, for AI and plagiarism detection. |
| Pro | $99.99/mo | $74.99 per month on annual billing ($899.88 a year). 1,000 credits a month, 25 user seats, website scanning, and analytics. |
Prices as listed in 2026 research. Always check the official site for the latest price — plans change. Free plan: No free plan — paid plans only.
Best for: schools, publishers, and editors who need reliable AI and plagiarism detection at scale.
Popular with: Teachers, Students, Writers
Popular with: Teachers, Students, Writers
How it works
The platform is used by schools, publishers, and businesses that need to verify originality at scale. It offers a browser extension, a Google Docs add-on, and an API, so checks can run inside existing workflows rather than as a separate step.
Copyleaks runs on a credit system: one credit covers up to 250 words or one image, and the Personal plan starts at $16.99 a month. It is a serious, well-regarded detector, though no detector is perfectly accurate, and results should always be reviewed by a human.
Pros and Cons
✓ Pros
- Strong detection for AI text, including paraphrased content
- Credit system works across text and image checks
- Good integrations for existing workflows
✗ Cons
- No permanent free plan, only a limited trial
- Credit costs add up at high volume
- No detector is 100% accurate, so human review is still needed
Frequently Asked Questions
Is Copyleaks free?
No — Copyleaks has no free plan. Free trial; Personal from $13.99/mo annual
What is Copyleaks best for?
schools, publishers, and editors who need reliable AI and plagiarism detection at scale.
What kind of tool is Copyleaks?
Copyleaks is a Writing Assistants tool on VerlumoAI.
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View detailsLast reviewed: November 2026