Copyleaks
Detects AI-generated text and plagiarism for editorial, enterprise, and education.
FreemiumFree planWeb
Last verified Jun 16, 2026
Decision snapshot
Fast-read signals for fit, pricing, and trust.
- Category
- Content Marketing and Copywriting
- Best for
- AI content detector
- Pricing
- Freemium
- Access
- Free plan available
What is this tool?
Copyleaks is a content-integrity platform that detects AI-generated text and plagiarism, with a writing assistant, API, LMS integration, and a browser extension. It is aimed at editorial teams, enterprises, and educational institutions governing content and originality. Detection plus plagiarism at organisational scale is its angle. Detection is probabilistic, so flagged text informs a human judgement rather than proving how something was written.
By QT Desk
Read full overviewHide full overview
You submit text and it assesses whether it appears AI-generated and checks it against sources for plagiarism, with an API and LMS integration for institutions, a browser extension, and writing-assistant features around the core checks.
It suits publishers, enterprises, and universities that need to govern AI use and protect originality across many documents and users, not just spot-check one.
Detection is a probability, not a verdict — human and AI writing overlap and no detector is perfect — so flagged text warrants a human review, and accuracy varies by language and content.
Is this right for you?
Quick fit check against how you actually work.
Choose this if
- You govern AI use and originality at scale
- You want detection and plagiarism together
- You need API or LMS integration
- You handle many documents or users
Consider alternatives if
- You expect proof of authorship
- You only check the rare sentence
- You want a writing generator instead
Key features
What you can actually do with this tool.
AI content detection
Assesses whether text appears AI-generated for content-integrity review.
Plagiarism checker
Checks text against sources to flag matching passages.
API integration
Exposes an API to embed checks into a workflow at scale.
LMS integration
Connects to learning systems for educational use.
Browser extension
Brings checks into the browser for in-place review.
Writing assistant
Adds writing-assistant features around the core checks.
Plans & pricing
Pricing tiers and what's included in each.
A limited free AI detector is available. Paid Personal plans start at $16.99 per month ($13.99/month billed annually).
Personal
$16.99/mo
Pricing last checked: Jun 16, 2026Official pricing pagePricing may have changed. Always verify before purchasing.
How to use this tool
A short path to first value.
Submit text, or connect via API or LMS.
Run AI detection and a plagiarism check.
Review the flagged passages and matches.
Treat the result as input to a human decision.
Use the extension for in-place checks.
Govern AI use and originality across your team.
Frequently asked
Common questions about this tool, answered.
How reliable is the detection?
It's probabilistic — human and AI writing overlap, so results indicate likelihood and should guide a human review rather than prove how text was written.
Can it flag human writing wrongly?
Yes — false positives are possible, so treat flags as a prompt to examine a passage, not a conclusion.
Does it fit institutional workflows?
An API and LMS integration target editorial, enterprise, and education use at scale rather than one-off checks.
Is submitted content kept private?
Data handling is buyer-relevant at scale, so confirm the current privacy and retention terms before submitting sensitive work.
How it compares
Context for choosing between this tool and alternatives.
Detection tools differ on audience; Copyleaks leans to editorial, enterprise, and education with API and LMS reach, while Winston AI adds image detection and reports, GPTZero focuses on text classification, and ZeroGPT bundles extra utilities. Compare on whether organisational integration or a focused detector fits.
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Verified against the official siteLast verified Jun 16, 2026