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Copyleaks AI Detector

copyleaks.com

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Spec score 9.2 #1 of 31 in Plagiarism Checkers

What it is

Copyleaks AI Detector identifies AI-written text, including writing that mixes AI and human passages. It supports more than 30 languages and names GPT-5, GPT-4, ChatGPT, Claude, Gemini, DeepSeek, Llama, Bloom, Rytr, and Jasper among the sources it detects. AI Logic explains flagged results, displays AI phrase frequency, and can identify text appearing in published content elsewhere. The web detector scans up to 25,000 characters without login; the website platform requires at least 255 characters and accepts up to 2,000 pages. A Chrome and Edge extension accepts 350 to 25,000 characters, and a Google Docs add-on and education LMS integrations connect it to other workflows. Personal costs $13.99 a year with annual billing or $16.99 a month; Pro costs $74.99 a year with annual billing or $99.99 a month. A free plan and free trial are listed. Copyleaks says data is encrypted at rest with AES-256, reports SOC 2 and SOC 3 certifications, and supports GDPR compliance.

Spec sheet

What it does
Copyleaks analyzes text for AI generation, plagiarism, paraphrasing and content authenticity.Read 21 Oct 2026 · copyleaks.com
Purpose
The AI Detector identifies AI-written text, including text blended with human writing.Read 4 Oct 2026 · copyleaks.com
API
The developer product is a REST API returning section-level human or AI classifications, an overall summary and explanations.Read 21 Oct 2026 · docs.copyleaks.com
Security
Copyleaks states that data is encrypted at rest with AES-256 and that it holds SOC 2 and SOC 3 certifications and supports GDPR compliance.Read 4 Oct 2026 · docs.copyleaks.com
Compliance
The company lists SOC 2, SOC 3, GDPR, PCI DSS and NIST Risk Management Framework alignment.Read 21 Oct 2026 · copyleaks.com
Headquarters
New York, NY, United StatesRead 28 Sep 2026 · copyleaks.com
Accuracy claim
The maker advertises more than 99% AI-detection accuracy and a 0.03% false-positive rate.Read 21 Oct 2026 · copyleaks.com
AI Logic
AI Logic explains flagged results with AI phrases, source matches and statistical reasons.Read 21 Oct 2026 · copyleaks.com
Browser and document integrations
The detector offers a browser extension for Chrome and Edge and a Google Docs add-on.Read 4 Oct 2026 · copyleaks.com
Browser extension
Copyleaks provides a Chrome, Edge and Firefox extension for checking highlighted web content.Read 21 Oct 2026 · copyleaks.com
Company location
Copyleaks lists its address as 115 E 23rd St., 7th Fl, New York, NY 10010.Read 4 Oct 2026 · copyleaks.com
Company profile
LinkedIn lists Copyleaks as a privately held New York software company founded in 2015 with 51–200 employees.Read 21 Oct 2026 · linkedin.com
Documentation depth
The documentation includes quickstarts, endpoint examples, data models, scan results and webhook payload references.Read 21 Oct 2026 · docs.copyleaks.com
Education integrations
Its education LMS integrations include Canvas, D2L, Moodle, Blackboard, Schoology, Edsby, and Sakai.Read 4 Oct 2026 · copyleaks.com
Evasion detection
The API documentation says detection can identify character substitutions, text spinners, hidden characters and heavily edited AI text.Read 21 Oct 2026 · docs.copyleaks.com
Free API sandbox
API sandbox mode returns simulated results without consuming credits.Read 21 Oct 2026 · docs.copyleaks.com
Free scanning limit
The web detector lets users scan up to 25,000 characters without logging in, and new users receive limited free credits.Read 4 Oct 2026 · copyleaks.com
Google Docs
A Google Docs add-on runs AI detection inside documents.Read 21 Oct 2026 · copyleaks.com
Input limits
The web detector accepts at least 255 characters and up to 2,000 pages; its browser extension requires 350 to 25,000 characters.Read 21 Oct 2026 · copyleaks.com
Language support
AI detection supports more than 30 languages, while plagiarism detection supports more than 100.Read 21 Oct 2026 · copyleaks.com
Launch news
Copyleaks announced its multilingual enterprise AI Content Detector on January 12, 2023.Read 21 Oct 2026 · copyleaks.com
Legal name
Crunchbase identifies the legal entity as Copyleaks Inc.Read 21 Oct 2026 · crunchbase.com
Limit: inconsistent or false results
Trustpilot complaints repeatedly mention false AI flags, missed AI text and different results for identical documents.Read 21 Oct 2026 · trustpilot.com
Limit: pricing and credits
Capterra reviewers say pricing is high for students and the credit system is confusing initially.Read 21 Oct 2026 · capterra.com
LMS integrations
Official integrations include Canvas, D2L Brightspace, Moodle, Blackboard, Schoology, Edsby and Sakai.Read 21 Oct 2026 · copyleaks.com
Mixed authorship
Reports distinguish human and AI-written passages when the two are blended in one document.Read 21 Oct 2026 · copyleaks.com
Model coverage
The detector names ChatGPT, GPT-5, Claude, Gemini, DeepSeek, Llama, Bloom, Rytr and Jasper among supported models.Read 21 Oct 2026 · copyleaks.com
Models and languages
Copyleaks says the detector supports over 30 languages and detects content from GPT-5, GPT-4, ChatGPT, Claude, Gemini, DeepSeek, Llama, Bloom, Rytr, Jasper, and more.Read 4 Oct 2026 · copyleaks.com
Praise: support and parsing
Software Advice reviewers describe responsive support, broad file support and strong PDF parsing.Read 21 Oct 2026 · softwareadvice.com
Praise: usability
Capterra reviewers repeatedly praise the browser extension and ease of checking content in place.Read 21 Oct 2026 · capterra.com
Rating on Capterra
4.4 out of 5 from 91 reviewsRead 21 Oct 2026 · capterra.com
Rating on Chrome Web Store
4.1 out of 5 from 708 ratingsRead 21 Oct 2026 · chromewebstore.google.com
Rating on G2
4.5 out of 5 from 41 reviewsRead 21 Oct 2026 · g2.com
Rating on Gartner Peer Insights
3 out of 5 from 1 reviewRead 21 Oct 2026 · gartner.com
Rating on GetApp
4.4 out of 5 from 91 reviewsRead 21 Oct 2026 · getapp.fr
Rating on Trustpilot
2.7 out of 5 from 366 reviewsRead 21 Oct 2026 · trustpilot.com
Rating on TrustRadius
8.8 out of 10 from 21 reviewsRead 21 Oct 2026 · trustradius.com
Scan requirements
The website platform requires at least 255 characters and allows up to 2,000 pages; the browser extension requires 350 to 25,000 characters.Read 4 Oct 2026 · copyleaks.com
SDKs
Quickstart examples cover cURL, Python, JavaScript, C#, PHP, Ruby and Java client usage.Read 21 Oct 2026 · docs.copyleaks.com
Security encryption
Copyleaks states that stored data uses AES-256 encryption and network traffic uses TLS-secured HTTPS connections.Read 21 Oct 2026 · docs.copyleaks.com
Security hosting
Copyleaks says it offers on-premises Cloud Private Hubs and regional hosting, including Germany-based servers for European customers.Read 4 Oct 2026 · docs.copyleaks.com
Self-hosting
Security documentation describes on-premises Cloud Private Hubs for organizations retaining data in their own environment.Read 21 Oct 2026 · docs.copyleaks.com
Sensitivity controls
API scans expose three sensitivity levels covering unedited, lightly edited and heavily modified AI text.Read 21 Oct 2026 · docs.copyleaks.com
Support and service
Enterprise and Education plans include dedicated customer success resources, and Education includes tailored onboarding and training.Read 4 Oct 2026 · copyleaks.com
Webhooks
URL submissions support status webhooks and an aiGeneratedText detection option.Read 21 Oct 2026 · docs.copyleaks.com
Who it serves
Copyleaks describes its users as including students, writers, professionals, creators, educational institutions, and enterprise teams.Read 4 Oct 2026 · copyleaks.com

Plans and prices

Personal Priced on request AI detection and plagiarism detection · 30+ AI-detection languages · 1,200 unified credits · Up to 300,000 words per billing period · Multiple-file uploads · Browser extension Read 19 Sep 2026 · copyleaks.com
Pro Priced on request Everything in Personal · 25 user seats · Advanced detection filters · Website scanning · Analytics dashboard · 12,000 unified credits Read 19 Sep 2026 · copyleaks.com
Personal $16.99 a month AI detection 30+ languages · plagiarism 100+ languages · 100 credits · 25,000 words or 100 images · browser extension · Google Docs Read 21 Oct 2026 · copyleaks.com
Personal (monthly billing) $16.99 a month Monthly subscription 100 unified credits: up to 25,000 words or 100 images · AI detection in 30+ languages · Browser extension · Google Docs add-on Read 4 Oct 2026 · copyleaks.com
Pro $99.99 a month Everything in Personal · 25 seats · advanced filters · website sitemap scanning · cross-language detection · analytics · 1,000 credits · 250,000 words or 1,000 images Read 21 Oct 2026 · copyleaks.com
Pro (monthly billing) $99.99 a month Monthly subscription 1,000 unified credits: up to 250,000 words or 1,000 images · 25 user seats · Advanced detection filters · Website scans · Analytics dashboard Read 4 Oct 2026 · copyleaks.com
Personal (annual billing) $167.88 a year $167.88 billed annually 1,200 unified credits: up to 300,000 words or 1,200 images · AI detection in 30+ languages · Browser extension · Google Docs add-on Read 4 Oct 2026 · copyleaks.com
Pro (annual billing) $899.88 a year $899.88 billed annually 12,000 unified credits: up to 3,000,000 words or 12,000 images · 25 user seats · Advanced detection filters · Website scans · Analytics dashboard Read 4 Oct 2026 · copyleaks.com
Education Priced on request Custom pricing · LMS integrations · institution analytics · dedicated customer success · private cloud Read 21 Oct 2026 · copyleaks.com
Education Priced on request Custom pricing based on full-time student count; contact sales AI and plagiarism detection plus grammar check · LMS integration · Student, course, and institution analytics · Dedicated private cloud Read 4 Oct 2026 · copyleaks.com
Enterprise Priced on request Custom pricing · API access · LMS integration · private or on-premises hosting options Read 21 Oct 2026 · copyleaks.com
Enterprise Priced on request Custom pricing; contact sales Custom usage · API integration · Organization-wide policies · Role-based access · On-premises or private cloud hosting · Dedicated customer success Read 4 Oct 2026 · copyleaks.com

Every Copyleaks AI Detector plan and price →

Strong points and limits

Strong points

  • Detects text from named AI services in 30+ languages.
  • AI Logic explains flags and shows phrase frequency.
  • Web scans allow up to 25,000 characters without login.
  • Chrome, Edge, Google Docs, and LMS integrations.

Limits

  • Website scans require at least 255 characters.
  • Extension scans require 350 to 25,000 characters.
  • Personal and Pro plans have listed recurring prices.

Who it suits

It suits writers, students, professionals, creators, educational institutions, and enterprise teams seeking AI-text detection. The LMS integrations and API may also suit education or organization workflows.

Verdict

The detector combines multilingual identification with explanations and integrations for browser, document, education, and API workflows. Check scan-size requirements and the listed billing options against the way you plan to use it.

Where Specifiction places it

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