Copyleaks

What it's good for

• 1

  Schools and universities checking student work for AI and plagiarism

• 2

  Enterprises enforcing content and originality policy at scale

• 3

  Verifying content across multiple languages for compliance

• 4

  Building detection into an LMS or CMS through the API

• 5

  Auditing whether published content came from a human

Pricing

• Free

  ~2,500 words a month

  Free

• AI + Plagiarism

  Combined detection

  $13.99/mo

• Pro

  Higher limits

  $99.99/mo

• API + Enterprise

  Integration and volume

  Usage/Custom

How to use it

Start on the free tier (about 2,500 words a month) to test detection on your own content. For an institution or business, wire the API into your LMS, CMS, or internal workflow so AI and plagiarism checks run where content already lives. Move to Pro or an Enterprise plan as volume grows. Treat scores as a signal to review, not a final verdict, especially on multilingual or borderline text.

Pros & cons

Frequently asked questions

• Is Copyleaks free?

  There is a free tier of about 2,500 words a month, enough to test detection on real content. Paid plans start with combined AI and plagiarism detection around $13.99 a month, a Pro tier at $99.99 a month, and API plus Enterprise plans priced by usage or custom quote for higher volume.

• Copyleaks vs Originality.AI: which should I pick?

  Originality.AI is aimed at SEO and content teams checking web copy. Copyleaks targets a different buyer: education, enterprise, and multilingual compliance, with both AI-content and plagiarism detection and an API. If you need multilingual coverage, an audit trail, and enterprise controls, Copyleaks fits; for lean SEO-team checks, Originality.AI is more focused.

• What is Copyleaks best for?

  Institutions and businesses that need to verify content at scale: schools checking student work, enterprises enforcing content policy, and teams working across languages. It pairs AI-content detection with plagiarism detection, both reachable through an API, which suits integration into an LMS or internal system.

• How is Copyleaks different from GPTZero?

  GPTZero is largely a consumer and individual-user detector. Copyleaks is an enterprise, multilingual platform with a plagiarism-detection heritage and an API for building checks into other systems. Same broad job, different buyer: reach for Copyleaks when you need scale, languages, and integration rather than a quick one-off check.

• Does Copyleaks have an API?

  Yes. Both AI-content and plagiarism detection are available through an API, so you can build checks into a learning platform, CMS, or internal workflow. API and Enterprise plans are priced by usage or custom quote, which is the route for higher volume.

More

• Copyleaks
• Copyleaks API docs

Alternatives to Copyleaks

Other tools we'd consider for the same job.

• Originality.AI

  AI detection + plagiarism scanning for content marketing and SEO. Lower false positives on long-form than general-purpose detectors

• GPTZero

  AI text + deepfake detection. Covers writing, images, and humanised AI content for compliance, education, and trust workflows

Other AI Detection & Trust tools

• Pangram

  AI-text detector with a very low false-positive rate, independently validated by University of Chicago and Maryland

• GPTZero

  AI text + deepfake detection. Covers writing, images, and humanised AI content for compliance, education, and trust workflows

• Originality.AI

  AI detection + plagiarism scanning for content marketing and SEO. Lower false positives on long-form than general-purpose detectors