Noplag’s plans are positioned for makers and small teams, agencies and publishers, and universities or regulated organizations.
Free plan Free trial Open source From $9.99 a month WebWindowsMacLinuxAPISelf-hosted
Best AI Plagiarism Checkers 2026
Facts read 30 Sep 2026 – 21 Oct 2026
AI plagiarism checkers can help review writing against available sources, with AI-writing checks adding another dimension to consider. Compared on AI writing check and source coverage, these tools also differ in maximum document words, supported file formats, and report export. If results need to fit an existing workflow, compare LMS integrations and API access as well. Plagium, Check-Plagiarism, and PrePostSEO Plagiarism Checker are among the entries to examine. Free-plan availability and paid-from pricing provide context for access and cost, so you can weigh the checking features against the documents you handle and the way you need to share findings.
The standings: top 10
| Name | In a line | Record score | Price from | Try it free | Runs on | Facts read |
|---|---|---|---|---|---|---|
| 01 Noplag | Noplag’s plans are positioned for makers and small teams, agencies and publishers, and universities or regulated organizations. | 6.1 | $9.99 a month | Free plan | Web, Windows, Mac, Linux | 15 Oct 2026 |
| 02 Plagiarisma | Plagiarisma may suit students, bloggers, and freelance writers checking text for originality. | 6.0 | $99 a year | Free plan | Android, Web, Windows, Browser extension | 15 Oct 2026 |
| 03 PrePostSEO Plagiarism Checker | It may suit students, teachers, researchers, content writers, and bloggers who need plagiarism checks and matched-source details. | 5.9 | $7.50 a year | Free plan | Android, iPhone & iPad, Web, Windows | 4 Oct 2026 |
| 04 Plagium | Plagium may suit educators, publishers, editors, companies, researchers, and compliance teams checking submitted writing. | 5.7 | $19.98 a month | Free plan | Android, iPhone & iPad, Web, Browser extension | 15 Oct 2026 |
| 05 Check-Plagiarism | It may suit students, teachers, researchers, content creators, and publishers who need to review text for matches. | 5.6 | Free plan | Free plan | Android, Web, API | 15 Oct 2026 |
| 06 Copyleaks AI Detector | Copyleaks suits students, writers, professionals, creators, educational institutions, and enterprise teams checking text for AI involvement. | 5.5 | Free plan | Free plan | Web, Browser extension, API, Self-hosted | 21 Oct 2026 |
| 07 Copyscape | It suits people checking web pages or written content for online copies, including those who want batch searches, private-index checks, or monitoring. | 5.5 | $4.95 a month | Free plan | Web, API, Self-hosted | 15 Oct 2026 |
| 08 PlagAware | PlagAware may suit educational institutions, businesses, and individuals checking or monitoring text for plagiarism and duplicate content. | 5.5 | €2.99 a month | Free plan | Web, API | 15 Oct 2026 |
| 09 PlagiarismSearch | PlagiarismSearch suits students, educators, writers, bloggers, universities, and organizations checking originality or AI-writing indicators. | 5.3 | $27.95 a month | Free plan | Web, Browser extension, API | 2 Oct 2026 |
| 10 Plagius | 5.2 | $58.80 a year | Free trial | Web, Windows, Mac | 3 Oct 2026 |
02
Plagiarisma
Plagiarisma may suit students, bloggers, and freelance writers checking text for originality.
AndroidWebWindows+2 Record6.0 Visit
03
PrePostSEO Plagiarism Checker
It may suit students, teachers, researchers, content writers, and bloggers who need plagiarism checks and matched-source details.
AndroidiPhone & iPadWeb+3 Record5.9 Visit
04
Plagium
Plagium may suit educators, publishers, editors, companies, researchers, and compliance teams checking submitted writing.
AndroidiPhone & iPadWeb+2 Record5.7 Visit
05
Check-Plagiarism
It may suit students, teachers, researchers, content creators, and publishers who need to review text for matches.
AndroidWebAPI Record5.6 Visit
6
Copyleaks AI Detector
WebBrowser extensionAPI+1 Free plan Record5.5 Visit Copyleaks suits students, writers, professionals, creators, educational institutions, and enterprise teams checking text for AI involvement.
7
Copyscape
WebAPISelf-hosted $4.95 a month Record5.5 Visit It suits people checking web pages or written content for online copies, including those who want batch searches, private-index checks, or monitoring.
8
PlagAware
WebAPI €2.99 a month Record5.5 Visit PlagAware may suit educational institutions, businesses, and individuals checking or monitoring text for plagiarism and duplicate content.
9
PlagiarismSearch
WebBrowser extensionAPI $27.95 a month Record5.3 Visit PlagiarismSearch suits students, educators, writers, bloggers, universities, and organizations checking originality or AI-writing indicators.
11
Proofademic
WebAPI $15 a month Record5.2 Visit Proofademic may suit educators, students, institutions, publishers, and enterprise teams reviewing submitted writing.
13
PlagiarismCheck.org
WebBrowser extensionAPI $5.99 one-time Record5.1 Visit It suits students, educators, institutions, researchers, and businesses needing browser-based originality or authorship checks.
14
DrillBit
AndroidiPhone & iPadWeb+1 $5 one-time Record5.0 Visit DrillBit may suit institutions, schools, researchers, publishers, businesses, or individuals seeking similarity checks, AI-content detection, and document analysis.
16
Plagiarism Checker X
Windows $39.95 one-time Record4.9 Visit It suits students, teachers, writers, universities, colleges, and SEO agents who need to review text for similarity.
17
SmallSEOTools Plagiarism Checker
WebBrowser extensionAPI $94.08 a year Record4.9 Visit The checker may suit students, teachers, writers, bloggers, marketers, researchers, and academics who want reports with matched-source details.
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