Comparison of anti-plagiarism software

The following tables compare software used for plagiarism detection.

General
Software Developer First public release Latest stable version License Deployment options Scripts supported Notes
Copyscape Indigo Stream Technologies, Ltd. 2004 freemium[1] SaaS 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 SaaS Latin
PlagScan PlagScan GmbH 2008 limited SaaS, On-Premises[5] Latin, Cyrillic & Arabic[6][7] Submissions are checked against (public) online documents, a (private) shared repository, and the user's own (private) repository.[8]
PlagTracker Devellar 2011 freemium SaaS Latin, Cyrillic Rated as "Useless for academic purposes" by Plagiats Portal[9]
Turnitin iParadigms 1997 proprietary SaaS Latin & multiple scripts through translation [10] Automatically stores uploaded texts (submitted for checking) in its own database.[11]
Unicheck Unicheck 2014 SaaS proprietary SaaS Latin, Cyrillic Pricing "per page" based on 137.5 words per nominal page.[12]
gollark: Most people never look after the first 100 digits.
gollark: Fear it, yes.
gollark: https://www.df7cb.de/projects/sdate/
gollark: https://twitter.com/AdamJKucharski/status/1438208628348100624?s=19
gollark: https://rythm.fm/

References
  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. Plagiarism Detection Within your own Data Processing Center
  6. PlagScan FAQ: "Is it possible to check text in any language?" Accessed 2019-02-06.
  7. PlagScan : Kommentar zum Software-Test der HTW 2013 (in German). Accessed 2019-02-06.
  8. Plagiarism Prevention Pool (PPP) | PlagScan. Accessed 2019-02-05.
  9. 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.
  10. - Enable Translated Matching
  11. Plagiarism Detection Systems Not Tested in 2013, Plagiats Portal. Analyses by Debora Weber-Wulff (HTW Berlin). Accessed 2019-02-06.
  12. Strong plagiarism finder - Unicheck. Prices Accessed 2019-02-06.
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