4
Originality.ai
Originality.ai offers tools for checking AI-generated text, plagiarism, facts, readability, grammar, spelling, and content quality.
Free planWebAPIExtension
7.6From $12.95 a month
Visit
5
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
Visit
6
PlagAware
PlagAware is a plagiarism search engine for educational institutions, businesses and individuals.
Free planWebAPI
7.4Free plan
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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
Visit
8
DrillBit
DrillBit is an AI-powered platform for plagiarism detection and content integrity.
AndroidiOSWebAPI
6.8$5 one-time
Visit
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
Quetext AI Detector
Quetext AI Detector analyzes writing for signs of AI-generated text and displays line-by-line results with a confidence score.
Free planWebAPIExtension
6.8From $7.99 a month
Visit
12
Smodin Plagiarism Checker
Smodin Plagiarism Checker compares submitted text with web and academic material, then returns similarity scores, matched source links, and…
AndroidiOSWebAPI
6.8From $10 a month
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13
Crossref Similarity Check
Crossref Similarity Check helps eligible Crossref members identify potential plagiarism by comparing manuscripts with published academic and general web content.
Free planWebAPI
6.6Free plan
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14
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
Visit
15
PlagiarismSearch
PlagiarismSearch checks submitted text against selected web, archived, publication, academic, and enabled organizational sources.
WebAPIExtension
6.4From $27.95 a month
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16
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
17
Plagiarism Detector
Plagiarism Detector checks documents for plagiarism and AI-generated content, then produces originality reports.
Free planWebWindows
6.3Free plan
Visit
18
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
19
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
20
iThenticate
WebAPI
6.1$125 one-time
Visit
21
MOSS
MOSS measures program similarity and has primarily been used to identify possible plagiarism in programming classes.
Free planWebLinux
6.1Free plan
Visit
22
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
23
Viper
Viper is a web app for checking documents for plagiarism and AI-generated content.
Web
6.1£5 one-time
Visit
24
JPlag
JPlag is a free, open-source tool that identifies pairwise similarities among programs to help detect source-code plagiarism and collusion.
Free planAPILinuxSelf-hosted
5.9Free plan
Visit
25
Plag
Plag is a web platform for detecting plagiarism and AI-generated writing.
Web
5.9From €14.95 a month
Visit
26
Plagiat.pl
Web
5.9
Visit
27
Plagramme
Plagramme is a web-based multilingual platform for detecting text similarity and preventing plagiarism.
Web
5.9From $14.95 a month
Visit
28
Turnitin AI Writing Detection
Web
5.4
Visit
29
Red Paper
Web
5.2
Visit
30
Compilatio Magister+
Web
4.7
Visit

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