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Synonymizer - Equal word replacer

Plagiarism Plagiarism Detection Tools

(Detection usually prevented by text synonymization)

Plagiarism - Disclaimer

Plagiarism Detection Tools

The simplest Plagiarism Detection Tools are Google, Altavista and other full-text indexing search engines. A short sentence of the suspicious text searched in Google will probably provide its source in few seconds. No main Search Engine provides a "fuzzy search" option so far. Such option would detect plagiarism even in Synonymized texts.
After reviewing the Plagiarism Detection Tools available in the Web, we found that they are quite good at analyzing long texts and at examining many documents at once. These features are provided for teacher's convenience. Any long paragraph taken from the Internet by a lazy student will probably be detected at once.
Only one of these products claims to detect synonyms in otherwise exact replica texts. The synonym list they use is not nearly as extensive as the one we include in the paid version of Synonymizer. They do not detect periphrasis (phrases used instead of words) or intensive replacements. Use of Synonymizer avoids Copyscape duplication alarm. We found that the limit is 28% of word replacement, or 26% plus phrase mixing. There are the examples of how synonymized text eludes copyscape detection.




EVE2 Plagiarism Detection system

"Open up a file that your student has written and Eve will check the Internet to see if any or all of it has been plagiarized".

Uses advanced searching tools to locate suspect sites and it does a direct comparison of the submitted essay to the text appearing on the suspect site. If it finds evidence of plagiarism, the URL is recorded. Once the search has completed, a full report is given on each paper that contained plagiarism, including the percent of the essay plagiarized, and an annotated copy of the paper showing all plagiarism highlighted in red.

$19.99 per license


A paper submitted to the service is checked against a database of manuscripts; estimated at more than one million; and a database of books and journals, as well as more than a billion Web sites. Phrases that seem to be unoriginal are flagged for professors to check.

Instructors and students submit documents through an easy-to-use online interface. Turnitin servers compare submitted documents against our proprietary database of over 10 million student papers. Turnitin's content databases contains millions of pages of books and journals and over 4.5 billions pages of the current and archived internet. The results are returned in the form of customized Originality Reports, in which any text matches found in our databases are highlighted and linked to their source.

$1,000 to $10,000 a year, depending on college size A google-like search engine. Works on whole URLs. Huge database. Free limited service, Premium Service, Copysentry services.


The system claims to work by comparing each submitted file to its database, using its own registered algorithm, as well as searching the Web. If a match is found details of a tutor with a matching assignment are said to be returned

Same as turnitin



The system checks papers against its internal database and the wider Web. Unlike the other services, submissions can be made in many common word processing formats as well as plain text, although this doesn't take away the need to hand in a local, printed copy

CopyCatch Detective is aimed at protection of copyright and trade secret material. It speeds up the identification process from around one day for a skilled person to around 5 minutes.

It assists the presentation of the material for legal purposes by identifying the similarities between the two documents, and folding the two together at the section level using different fonts and colour schemes. These files are saved in RTF format to preserve the colours and font, allowing straightforward replacement to preferred fonts in a word processor

Campus Licencing Cost 10p per student per annum

Departmental Licences from: British Pound 600 per annum

CopyFind 2.5 It compares text documents with one another to determine if they share words in phrases. When it finds two files that share enough words in those phrases, WCopyfind generates html report files. This program examines a collection of document files. It extracts the text portions of those documents and looks through them for matching words in phrases of a specified minimum length. When it finds two files that share enough words in those phrases, WCopyfind generates html report files. These reports contain the document text with the matching phrases underlined. Free to Download
My Drop Box MyDropBox allows instructors to submit suspicious student papers for plagiarism detection or set up class accounts so that students could submit their papers online without instructor involvement. MyDropBox provides its users plagiarism reports on submitted documents, alerting instructors in case of identified plagiarism and providing proof to confront cheaters. These reports identify exactly which sections of text are taken verbatim from Internet sources without documentation and points out passages that have been altered. The first step in our detection process is checking a student-submitted document against the current index of the Internet. In only 12 to 24 hours every document is checked against over 4.3 billion documents from our own and outsourced snapshots of the Internet. MyDropBox provides you with both thoroughness and speed in its less-than-a-day time frame. Each document undergoes a complicated series of matches that are not technologically feasible in a shorter time period.

The second step is analysis of published works in password-protected electronic document databases. MyDropBox also scours newspapers, magazines, term paper mills, electronic books, and online reference sites for potential sources of plagiarized text. 

Individual license: $89.90 per year

Institutional license: $0.50 per student enrolled

Ithenticate The system claims to work by comparing each submitted file to its database, using its own registered algorithm, as well as searching the Web. If a match is found details of a tutor with a matching assignment are said to be returned, the paper itself is not released. Same as turnitin The total cost of iThenticate is determined by frequency of use and a flat annual fee.