Best Plagiarism Checkers in 2026
Updated
In short: Noplag is ranked #1 of 31 as of 4 October 2026, ahead of PlagAware and PrePostSEO Plagiarism Checker. The best-ranked option with a free plan is PlagAware. The lowest first paid tier on this page is PrePostSEO Plagiarism Checker at $0.35/mo.
When reviewing writing for possible copied material, compare what each plagiarism checker can match and how it reports results. Academic source matching and web source matching indicate coverage, while supported languages and word limit help show what material can be checked. LMS integration or API access may be relevant if the tool needs to connect with an existing workflow; report export formats affect how findings can be shared. The ranking opens with PlagiarismCheck.org, Noplag, and PlagiarismSearch, followed by PlagAware. Consider free-plan availability and paid-from pricing together with the matching and reporting features you require.
31 plagiarism checkers ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#2 PlagAware Runner-up · 7.0 Free plan · €2.99/mo
#3 PrePostSEO Plagiarism Checker Also great · 6.9 $0.35/mo
- Free planFree trial apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
- Paid from
- 9.99 /mo
- Web source matching
- Yes
- Academic source matching
- Yes
- Supported languages
- 5 languages
- Word limit
- 2,500 words
RecognisedDocumentedFree planPlatforms$9.99/mofirst paid tier About NoplagVisit site - Free planFree trial apiWeb
- Free plan
- Yes
- Web source matching
- Yes
- Academic source matching
- Yes
RecognisedDocumentedFree planPlatforms€2.99/mofirst paid tier About PlagAwareVisit site - AndroidapiiOSmacOSWebWindows
- Free plan
- Yes
- Paid from
- 5.25 /mo
- Web source matching
- Yes
- Supported languages
- 20 languages
- Word limit
- 1,000 words
RecognisedDocumentedFree planPlatforms$0.35/mofirst paid tier About PrePostSEO Plagiarism CheckerVisit site - Free plan apiextensionWeb
- Free plan
- Yes
- Paid from
- 7.99 /mo
- Web source matching
- Yes
- Academic source matching
- Yes
- Supported languages
- 14 languages
- Word limit
- 1,000 words
RecognisedDocumentedFree planPlatforms$7.99/mofirst paid tier About Quetext AI DetectorVisit site - Free plan apiextensionWeb
- Free plan
- Yes
- Paid from
- 9.8 /mo
- Web source matching
- Yes
- Academic source matching
- Yes
- Word limit
- 1,000 words
RecognisedDocumentedFree planPlatforms$7.84/mofirst paid tier About SmallSEOTools Plagiarism CheckerVisit site - Free plan apiextensionWeb
- Free plan
- Yes
- Paid from
- 12.95 /mo
- Word limit
- 10,000 words
RecognisedDocumentedFree planPlatforms$12.95/mofirst paid tier About Originality.aiVisit site - Free plan WebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - AndroidapiextensioniOSWeb
- Free plan
- Yes
- Paid from
- 10 /mo
- Web source matching
- Yes
- Academic source matching
- Yes
RecognisedDocumentedFree planPlatforms$10/mofirst paid tier About Smodin Plagiarism CheckerVisit site - Free trial apiextensionWeb
- Free plan
- Yes
- Web source matching
- Yes
- Academic source matching
- Yes
- Word limit
- 150 words
RecognisedDocumentedFree planPlatforms$27.95/mofirst paid tier About PlagiarismSearchVisit site - Free trial macOSWebWindows
- Free plan
- No
RecognisedDocumentedFree planPlatforms$0.41/mofirst paid tier About PlagiusVisit site - apiextensionWeb
- Free plan
- Yes
- Web source matching
- Yes
- Academic source matching
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
RecognisedDocumentedFree planPlatforms - apiWeb
- Free plan
- Yes
- Web source matching
- Yes
- Academic source matching
- Yes
RecognisedDocumentedFree planPlatforms$9.99/mofirst paid tier About DupliCheckerVisit site - WebWindowsLinux
- Free plan
- Yes
- Web source matching
- No
- Academic source matching
- No
RecognisedDocumentedFree planPlatforms - Web
- Word limit
- 300,000 words
RecognisedDocumentedFree planPlatforms - WebLinux
- Free plan
- Yes
- Web source matching
- No
- Academic source matching
- No
- Supported languages
- 24 languages
RecognisedDocumentedFree planPlatforms - Windows
- Free plan
- Yes
- Web source matching
- Yes
- Academic source matching
- Yes
- Word limit
- 3,200 words
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
- Paid from
- 14.95 /mo
- Web source matching
- Yes
- Academic source matching
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Web source matching
- Yes
- Academic source matching
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
- Web source matching
- Yes
- Academic source matching
- Yes
- Supported languages
- 20 languages
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
- Web source matching
- Yes
- Academic source matching
- Yes
- Supported languages
- 129 languages
RecognisedDocumentedFree planPlatforms - WebWindows
- Free plan
- Yes
- Web source matching
- Yes
- Academic source matching
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
- Web source matching
- Yes
- Academic source matching
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
- Web source matching
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
- Web source matching
- Yes
- Academic source matching
- Yes
RecognisedDocumentedFree planPlatforms
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which plagiarism checker is ranked first on Everything Xiaomi?
Noplag is ranked #1 of 31 with a score of 7.3. PlagAware is second and PrePostSEO Plagiarism Checker third.
How many of these have a free plan?
6 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, PrePostSEO Plagiarism Checker has the lowest first paid tier we found: $0.35/mo.
How is this list ranked?
Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on. Paid placements never change a rank.