4
Copyscape
Copyscape checks web content and newly created human- or AI-generated text for plagiarism and duplicate material found online.
Free planWebAPISelf-hosted
7.5From $4.95 a month
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5
PlagAware
PlagAware is a plagiarism search engine for educational institutions, businesses and individuals.
Free planWebAPI
7.4Free plan
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6
Copyleaks AI Detector
Copyleaks AI Detector identifies AI-written text, including text blended with human writing.
WebAPIExtensionSelf-hosted
7.2
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7
SmallSEOTools Plagiarism Checker
SmallSEOTools Plagiarism Checker compares submitted writing with online material and returns a report showing where matches appear.
Free planWebAPIExtension
6.9From $94.08 a year
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8
DrillBit
DrillBit is an AI-powered platform for plagiarism detection and content integrity.
AndroidiOSWebAPI
6.8$5 one-time
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9
Plagius
Plagius analyzes academic papers and other documents for possible plagiarism by checking the internet or local files.
WebmacOSWindows
6.8From $58.80 a year
Visit
10
PrePostSEO Plagiarism Checker
PrePostSEO Plagiarism Checker checks submitted text for copied or duplicate content and reports plagiarism and unique-content percentages alongside…
AndroidiOSWebAPI
6.8From $7.50 a year
Visit
11
Proofademic
Proofademic analyzes submitted writing for possible AI-generated content and plagiarism.
Free planWebAPI
6.8From $15 a month
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12
Plagiarism Checker X
Plagiarism Checker X is Windows desktop software for checking documents and text against published web pages for plagiarism and similarity.
Free planWindows
6.6$39.95 one-time
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13
PlagiarismSearch
PlagiarismSearch checks submitted text against selected web, archived, publication, academic, and enabled organizational sources.
WebAPIExtension
6.4From $27.95 a month
Visit
14
StrikePlagiarism
StrikePlagiarism is an academic integrity system for finding text similarity, paraphrasing, and AI-generated content.
WebAPISelf-hosted
6.4$2.50 one-time
Visit
15
PlagiarismCheck.org
PlagiarismCheck.org checks text originality, verifies authorship, detects AI-generated content, and provides writing checks.
WebAPIExtension
6.2$5.99 one-time
Visit
16
DupliChecker
DupliChecker is an online collection of SEO and text analysis tools, including a plagiarism checker that assesses the originality of text.
WebAPI
6.1From $9.99 a month
Visit
17
iThenticate
WebAPI
6.1$125 one-time
Visit
18
PlagPointer
PlagPointer is a web service that checks documents for plagiarism and AI content in one scan.
Web
6.1
Visit
19
Scribbr Plagiarism Checker
Scribbr Plagiarism Checker is a web service for comparing academic work with online and published sources.
Web
6.1$19.95 one-time
Visit
20
Viper
Viper is a web app for checking documents for plagiarism and AI-generated content.
Web
6.1£5 one-time
Visit
21
PlagiarismDetector.net
PlagiarismDetector.net is an online service for checking plagiarism and similarity in text.
WebAPIExtension
6.0From $9.99 a month
Visit
22
SearchEngineReports Plagiarism Checker
SearchEngineReports Plagiarism Checker is a web tool for checking text, files, or webpages for similar material.
Web
6.0From $1,012 a month
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23
Turnitin Originality
Turnitin Originality adds academic integrity capabilities to similarity checking for institutions addressing misconduct beyond plagiarism.
Web
5.3
Visit
24
Turnitin Similarity
Turnitin Similarity is a web and API product that helps educators review student work for possible plagiarism and collusion.
WebAPI
5.2
Visit
25
Compilatio Magister+
Web
4.7
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