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] | 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] |