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Alternatives · 2026

The best Noplag Engine alternatives

The rest of Best Plagiarism Detection Software, in this site's order.

1
Noplag

Noplag’s plans are positioned for makers and small teams, agencies and publishers, and universities or regulated organizations.

WebWindowsMac+3 $9.99 a month Record6.1 Visit
2
Plagiarisma

Plagiarisma may suit students, bloggers, and freelance writers checking text for originality.

AndroidWebWindows+2 $99 a year Record6.0 Visit
3
Plagium

Plagium may suit educators, publishers, editors, companies, researchers, and compliance teams checking submitted writing.

AndroidiPhone & iPadWeb+2 $19.98 a month Record5.7 Visit
4
Dolos

Dolos suits teachers checking programming tests, exams, or exercises where limited collaboration is permitted.

WebWindowsMac+3 Free plan Record5.6 Visit
5
JPlag

It suits educators and developers comparing sets of code submissions locally.

WebWindowsMac+3 Free plan Record5.6 Visit
6
Copyleaks AI Detector

Copyleaks suits students, writers, professionals, creators, educational institutions, and enterprise teams checking text for AI involvement.

WebBrowser extensionAPI+1 Free plan Record5.5 Visit
7
Copyscape

It suits people checking web pages or written content for online copies, including those who want batch searches, private-index checks, or monitoring.

WebAPISelf-hosted $4.95 a month Record5.5 Visit
8
Originality.ai

It suits website owners, content marketers, writers, and publishers who need to review text or scan site content.

WebBrowser extensionAPI $12.95 a month, billed yearly Record5.5 Visit
9
Winston AI

Winston AI suits educators, SEO publishers, writers, and content creators who need AI-content detection or plagiarism checking.

WebBrowser extensionAPI+1 $189 a month, billed yearly Record5.5 Visit
10
GPTZero

GPTZero may suit educators, hiring teams, publishers, journalists, and others assessing writing authenticity.

WebBrowser extensionAPI $8.33 a month, billed yearly Record5.4 Visit
11 WebWindowsMac+2 €25.76 a month Record5.3 Visit
12 WebWindowsMac $58.80 a year Record5.2 Visit
13
Pangram

Pangram suits people who need AI-content and plagiarism checks for documents, web text, or social feeds.

WebBrowser extensionAPI $20 a month, billed yearly Record5.1 Visit
14
PlagiarismCheck.org

It suits students, educators, institutions, researchers, and businesses needing browser-based originality or authorship checks.

WebBrowser extensionAPI $5.99 one-time Record5.1 Visit
15
DrillBit

DrillBit may suit institutions, schools, researchers, publishers, businesses, or individuals seeking similarity checks, AI-content detection, and…

AndroidiPhone & iPadWeb+1 $5 one-time Record5.0 Visit
16
Quetext AI Detector

It may suit educators, writers, publishers, researchers, students, and other reviewers who need to assess text for AI generation or plagiarism.

WebBrowser extensionAPI $7.99 a month, billed yearly Record4.9 Visit
17
SmallSEOTools Plagiarism Checker

The checker may suit students, teachers, writers, bloggers, marketers, researchers, and academics who want reports with matched-source details.

WebBrowser extensionAPI $94.08 a year Record4.9 Visit
18 WebAPI $9.99 a month Record4.8 Visit
19 Web Free plan Record4.8 Visit
20 Web €14.95 a month Record4.7 Visit
21 WebBrowser extensionAPI $9.99 a month Record4.6 Visit
22 Web — Record4.5 Visit
23 WebLinux Free plan Record4.4 Visit
24 WebLinuxAPI+1 Free plan Record4.4 Visit