Similarity Texter

Additional Information


Software Profile | Description | Pros & Cons | Coverage results | Usability results | Screenshots

Software Profile

2101 Webster St, Suite 1800
Oakland, California 94612
United States
866 816 5046 (US)
+31 (0)30 227 02 00 (Europe)
+44 (0)191 681 0200 (UK)
+82 (0) 2 6020 6800 (Korea)
+61 (0) 3 8657 4500 (Australia)
+52 55 4169 6619 (Latin America)
Software-TypeOnline, can be integrated into Blackboard, LTI, Canvas and Moodle learning management systems
There are different license models, a campus License or a departmental license. The costs depend on the number of students. For more information the company has to be contacted.
Test DateNovember 2018 – November 2019


Turnitin was founded in 1999 by four students and grew to be an internationally known company. In 2014, they acquired the Dutch system Ephorus and “joined forces” (Ephorus, 2015). In 2019 they themselves were taken over by a US investment company, Advance (Turnitin, 2019). With a focus on institutional users only, they are used by 15,000 institutions in 150 countries. Turnitin uses its own crawler to search the web including also an archive of all previously indexed web pages (Turnitin, n.d.). Turnitin further compares the texts against published academic articles, as well as their own database of all assignments which have ever been submitted to the system, and optionally institutional databases. They are also developing many additional software tools for educators to use in teaching and giving feedback.

Pros & Cons

  • Turnitin system has high results for single source coverage result for English, German, Italian and Spanish languages.
  • This system successfully found similar texts from Wikipedia articles for all languages.
  • Easy to switch between the tested documents while viewing online reports.
  • It has low results for finding similarities in translations, manually paraphrased texts and online articles in Czech, Slovak, Latvian and Turkish languages.
  • This system is rather complicated to use, it is suggested to use „Help“ section to understand how to test documents.

Coverage results

Single source

Multi source

Usability results

Workflow process usability

  • Can upload and test multiple documents together
  • Auto-fill metadata for documents
  • The system uses original file names for report
  • There are no word limit for the testing document
  • The system display text in the chosen language only
  • The system can process large documents (for example, a bachelor thesis)

Result presentation usability

  • Reports are downloadable
  • Results are saved in the user’s account and can be reviewed afterwards
  • Matched passages are highlighted in the online report
  • Matched passages are highlighted in the downloaded report (offline)
  • Evidence of similarity is demonstrated side-by-side with the source in the online report
  • Evidence of similarity is demonstrated side-by-side with the source in the downloaded report
  • Document formatting is not changed in the report
  • Document page numbers are shown in the report
  • The report is not spoiled by false positives

Other usability aspects

  • System costs are clearly stated in the system homepage
  • Information about a free system trial version is advertised on the web-page
  • The system can be integrated as an API to a learning management system
  • The system can be integrated with the Moodle platform
  • The system provides call support
  • The call support is provided in English
  • English is properly used on the website and reports
  • There are no external advertisements



Ephorus. (2015). Ephorus and Turnitin are joining forces! Retrieved from

Turnitin. (2019, March 6). Advance to Acquire Turnitin, Leading Provider of Academic Integrity, Grading, and Feedback Solutions. Retrieved from

Turnitin. (n.d.). The Turnitin Difference: Our Web Crawler. Retrieved from

Company Statement