Learning & Education
Best Plagiarism Detection Software in 2026
When you need to check writing for possible source matches, compare tools against the documents and review workflow you have in mind. Maximum check size and supported languages help frame the material a service can handle; LMS integrations and browser extensions speak to where checks can fit.
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Copyleaks AI Detector It suits writers, students, professionals, creators, educational institutions, and enterprise teams seeking AI-text detection.
From $13.99/mo Free trial Web · API · Self-hosted · Browser extension9.2 Visit Specs - 02 Copyscape
Copyscape suits writers, publishers, and organizations checking online content or monitoring selected pages for copies.
From $4.95/mo Free plan Web · API · Self-hosted9.2 Visit Specs - 03
GPTZero It suits educators, hiring teams, publishers, journalists, and others assessing writing authenticity.
From $8.33/mo Free plan Web · API · Browser extension9.1 Visit Specs - 04
Noplag The free plan may suit occasional checks of shorter documents, while Pro is positioned for makers and small teams.
From $9.99/mo Free plan Open source Web · Windows · macOS · Linux9.1 Visit Specs - 05 Dolos
Dolos suits teachers checking programming tests, exams, and exercises where collaboration is permitted within small groups.
Free plan Open source Web · Windows · macOS · Linux9.0 Visit Specs - 06 Plagiarisma
It suits students, bloggers and freelance writers who want to check text from a document, URL or pasted passage.
From $8.25/mo Free plan Web · Windows · Android · API9.0 Visit Specs - 07
Originality.ai Originality.ai may suit website owners, content marketers, writers and publishers who need text checks or site scanning.
From $12.95/mo Free plan Web · API · Browser extension8.9 Visit Specs - 08 Plagium
Plagium is aimed at educational institutions, publishers, editors, companies, researchers, and compliance teams checking text.
From $19.98/mo Free plan Web · iOS · Android · API8.9 Visit Specs - 09 JPlag
JPlag suits educators and developers comparing submitted programs locally for similarity, plagiarism, collusion, or duplicated software parts.
Free plan Open source Web · Windows · macOS · Linux8.8 Visit Specs - 10
Codequiry Codequiry is aimed at educators, universities, and engineering teams that need to review submitted code for similarity or AI-associated code.
From €25.76/mo Free trial Web · Windows · macOS · Linux8.6 Visit Specs - 11 Noplag Engine
The free option suits people trying the hosted service or self-hosting.
From $9.99/mo Free plan Web · Windows · macOS · Linux8.5 Visit Specs - 12
Winston AI Winston AI presents its tools for education, SEO publishers, and writers and content creators.
From $5/mo Free plan Web · API · Self-hosted · Browser extension8.5 Visit Specs - 13
Pangram Pangram may suit people checking text or images for AI-generated content, or checking for plagiarism.
From $1.67/mo Free plan Web · API · Browser extension8.1 Visit Specs - 14
DrillBit Web · iOS · Android · API8.0 Visit Specs - 15 SmallSEOTools Plagiarism Checker
The checker may suit students, teachers, writers, bloggers, digital marketers, researchers, and academics who need to review text for matching sources.
From $7.84/mo Free plan Web · API · Browser extension7.9 Visit Specs - 16 Plagius
Plagius suits students, researchers, and other document reviewers who need plagiarism checks and AI-writing signals.
From $4.90/mo Free trial Web · Windows · macOS7.8 Visit Specs - 17
Quetext AI Detector It may suit educators, publishers, students, and other reviewers who need AI and plagiarism checks.
From $7.99/mo Free plan Web · API · Browser extension7.8 Visit Specs - 18 DupliChecker From $9.99/mo Web · API7.7 Visit Specs
- 19 iThenticate Web · API7.7 Visit Specs
- 20 MOSS Free plan Web · Linux7.7 Visit Specs
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Codeleaks Web · API · Self-hosted7.6 Visit Specs - 22
PlagiarismCheck.org It suits students, educators, institutions, researchers, businesses, and developers needing browser, integration, or API-based originality checks.
Web · API · Browser extension7.5 Visit Specs - 23 PlagiarismDetector.net From $9.99/mo Web · API · Browser extension7.4 Visit Specs
- 24 Plag.ai From €14.95/mo Web7.2 Visit Specs
- 25 PlagPointer Web7.1 Visit Specs
AI detection and API access add further criteria, while a free plan and paid-from price help you weigh cost. Noplag, Noplag Engine, and GPTZero are among the named options, alongside Plagium and Winston AI. Consider which of the listed capabilities matter for your review process, rather than assuming every checker serves the same purpose.
Compare Copyleaks AI Detector and Copyscape Get a place on this list