Our expertise:
detect copy and paste with the Compilatio similarity detector

Enhance the value of authentic work with fast and reliable plagiarism detection

Monolingual, cross-lingual similarity and reformulation detector

Some people are sometimes tempted to copy and paste texts into assignments and pass them off as their own. That's why it's important to detect similarities and fraudsters

Check the authenticity of documents using the Compilatio similarity detector. Spot plagiarism by identifying copy-pasted texts in several languages.

similarity rate and plagiarism rate

What is a similarity rate?

A similarity rate measures the degree of matching between two texts. It represents the quantity of passages in the document analysed that are similar to resources from the Internet, scientific publications, student work and other academic content.

It is useful to measure the similarity rate to assess the originality of a work and check whether it contains parts copied from other sources.


antiplagiarism software

What is a similarity detector?

A similarity detector is a technology that identifies potential plagiarism through the detection of similarities.

Compilatio analyses your documents to detect and measure similarities with all the sources required for an effective evaluation.
These sources include billions of web pages, tens of millions of scientific contents and student works... And all the documents in your reference collection, which you manage completely independently.

  • The objective: to find all the similarities and in all their forms (content copied identically, reworded and translated).

Examples of documents to analyse: dissertation, thesis, internship report, doctoral thesis, scientific article, press article, press review, etc.

How does Compilatio's similarity detection work?

The similarity detector identifies and highlights similarities between the text analysed and the sources found and/or added.

Compilatio offers several similarity detection technologies

  • Monolingual similarity detection.
  • Cross-lingual similarity detection.
  • Detection of reformulations.
plagiarism detector

Monolingual similarity detector

  • Check for similarities between texts in the same language to reveal copied content.
plagiarism detection

Cross-Lingual Similarity Detector

  • Identify similarities between texts in different languages to reveal the translated content in its original language.
anti plagiarism software

Reformulation detector

  • Identify passages with the same meaning in texts from the same language.

The 4 key steps in analysing similarities

Text extraction
Formatting the document to keep the plain text only
Search for sources
Using the key information in the text
Identifying similarities
Through an exhaustive comparison of the text with the selected sources
Cleaning up results
Filtering of relevant passages and removal of insignificant similarities
plagiarism checker

What does the Compilatio similarity detector compare documents with?

Compilatio is able to detect and measure similarities between your documents and billions of documents that can be consulted in digital form, including :

  • hundreds of billions of web pages accessible online
  • +300 million items of content, including :
        - private publications
        - open-access publications
        - internationally renowned professional publishers
        - university and research centre repositories
        - the most influential institutions
        - website archives
        - student work
  • all documents added and managed autonomously by users or managers of client institutions, in their reference library, while respecting the confidentiality of content.

Find out more about the contents of our comparison databases on our dedicated page.

multilingual plagiarism detector

Focus on cross-lingual plagiarism detector and reformulation detector

The cross-lingual similarity detector and the reformulation detector are available for several languages:

  • the main European languages: English, French, German, Spanish, Italian, Portuguese, Dutch, Polish, etc.
  • other languages from all over the world: Russian, Arabic, Chinese, Turkish, etc.

Teaching use case: 

A student draws heavily on a source and borrows passages which he rewrites using a reformulation tool.
When consulting the analysis report, the teacher suspects significant use of a source. With one click, he launches a multilingual comparison of the document with the source. All the reworded or translated passages are detected, and the score is updated with any additional similarities.

The teacher can demonstrate factually and quantify the use of the source, despite the rewording or translation.

To benefit from the "cross-lingual/multilingual similarity detection" and "reformulation detection" functionalities, your institution must have the Magister+ package.

plagiarism detection report

The results of a similarity analysis

The Compilatio similarity analysis report provides access to a range of complementary information

  • similarity percentage,
  • similarity locations,
  • list of sources,
  • face-to-face view of the document with each source.

Why choose Compilatio for similarity detection?

plagiarism detection expert
20 years' experience in plagiarism detection

Over 4 million students made aware and 1,000 institutions supported.

detect plagiarism
Advanced technology

Compilatio is an expert in automatic natural language processing. This enables us to offer reliable, secure and interoperable similarity detectors.

anti-plagiarism support
Tailor-made support

Compilatio provides resources for teachers, students and writing professionals to guide them towards authenticity.

Compilatio similarity detection: for who?

We help you detect plagiarism.
For teachers
Magister and Magister+

Compilatio Magister and Compilatio Magister+: similarity and AI detectors to raise awareness among your students.

For students

Compilatio Studium: similarity detector and resources to avoid plagiarism in your thesis and academic reports.

For writers

Compilatio Copyright: a comprehensive anti-plagiarism programme for editorial and publishing professionals.

They trust us

Teaching methodology

« We use Compilatio's Magister software to prevent plagiarism among nursing students and to validate work submitted by students. The first year, we mainly used it for introductory-level research assignments. Then, little by little, we integrated it into our teaching methodology and used it for all written work submitted by students that required research […] »

Verify Marketing Content

« Verify editorial content to ensure originality before delivering it to major brands: SEO articles, social content, blog posts, mailings, etc. »

Quality service

« The Schools-Media Department explored the market to choose a software solution for detecting similarities to supplement our system. This was the beginning of our constructive collaboration with Compilatio. […] the vast majority of our users are very satisfied, and very few want additional training. As for the project lead, the service is of high quality and matches our schools' expectations […] »

Acceptable similarity rate

« Compilatio's Studium allows me to be confident when submitting an assignment. I verify that the rate of similarities in my work (theses, research papers, etc.) is acceptable, based on recommendations from my teachers, who themselves also check for instances of plagiarism in assignments with the Magister detection tool. »

Analyse Scientific Research

« Analyse researchers' work and scientific articles before publication to ensure respect for intellectual property. »

Combating plagiarism

« Plagiarism is everyone's business! Raising awareness is aimed primarily at students, but plagiarism pertains to all school staff, whether they are teachers, researchers or administrators. It is part of a comprehensive approach that includes signing a charter, specific training, the use of plagiarism-detection tools and recommendations regarding disciplinary actions. »