Comparison of anti-plagiarism software

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The following tables compare software used for plagiarism detection.


Software Developer First public release Latest stable version License Deployment options Scripts supported Notes
Copyscape Indigo Stream Technologies, Ltd. 2004 freemium[1] Latin Targeted at website managers.[2]
Grammarly Grammarly, Inc. 2016 freemium SaaS Latin Checks against ProQuest databases and (public) web pages.[3]
HelioBLAST Virginia Bioinformatics Institute ? (free of charge web service) Latin Submissions are limited to 1,000 words. Checking against abstract and titles in Medline/PubMed.[4]
iThenticate iParadigms 2004 2017 proprietary Latin
PlagScan PlagScan GmbH 2008 limited SaaS Latin, Cyrillic & Arabic[5][6] Submissions are checked against (public) online documents, a (private) shared repository, and the user's own (private) repository.[7]
PlagTracker Devellar 2011 freemium Latin, Cyrillic Rated as "Useless for academic purposes" by Plagiats Portal[8]
Turnitin iParadigms 1997 proprietary Latin & multiple scripts through translation [9] Automatically stores uploaded texts (submitted for checking) in its own database.[10]
Unicheck Unicheck 2014 SaaS proprietary SaaS Latin, Cyrillic Pricing "per page" based on 137.5 words per nominal page.[11]


  1. ^ Copyscape FAQ: "What is the difference between Copyscape Premium and the free Copyscape service?". Accessed 2019-02-06.
  2. ^ Copyscape FAQ: "What is Copyscape used for?". Accessed 2019-02-06.
  3. ^ Grammarly: Plagiarism Checker. Accessed 2019-02-08.
  4. ^ HelioBlast website, Accessed 2019-02-02.
  5. ^ PlagScan FAQ: "Is it possible to check text in any language?" Accessed 2019-02-06.
  6. ^ PlagScan : Kommentar zum Software-Test der HTW 2013 (in German). Accessed 2019-02-06.
  7. ^ Plagiarism Prevention Pool (PPP) | PlagScan. Accessed 2019-02-05.
  8. ^ Results of the Plagiarism Detection System Test 2013; Plagiats Portal. See also detailed critique of PlagTracker on Plagiats Portal. Analyses by Debora Weber-Wulff (HTW Berlin). Accessed 2019-02-06.
  9. ^ - Enable Translated Matching
  10. ^ Plagiarism Detection Systems Not Tested in 2013, Plagiats Portal. Analyses by Debora Weber-Wulff (HTW Berlin). Accessed 2019-02-06.
  11. ^ Strong plagiarism finder - Unicheck. Prices Accessed 2019-02-06.