The first AI-driven plagiarism checker

  • Highest-grade plagiarism detection
  • AI-enhanced plagiarism results unique
  • Database of billions of articles
  • No limit on document size unique
  • 10+ years of operation
  • Freemium unique

The plagiarism checker loved by students and teachers alike

Submit well-done, plagiarism-free papers

Our plagiarism checker will provide you the highest-grade originality reports. Use these reports to nail and submit plagiarism-free papers. We have a partnerships with data agrregators such as CORE which allows comparing your papers against the database of billions of articles, including scientific articles.

What our clients say about us?



While other plagiarism checking services are charging in advance, we allow our users to check plagiarism for free. You can get the approximate plagiarism scores for free and freely decide is it worth to buy the detailed report or no. Curious what can you get for free?
  • Free plagiarism scores of your paper
  • Fast and accurate verification
  • Email support
Plagiarism checker for teachers
Plagiarism detector for students

University-grade plagiarism detection

Our comparative database consiste of billions of documents. Due to our partnerships with leading data providers and aggregators, we are able to offer our users plagiarism comparison against hundreds of millions of scientific articles.
  • Verification against more than 80 million scholarly articles
  • Data from data partners, content aggregators, university repositories
  • Our services are used by hundreds of educational facilities worldwide

Full privacy

Our services are fully confidential and private. All you data is safe with us. We do not share any your personal data with any third party.
  • Do not include your papers in database
  • We protect your data
  • We protect your privacy
Originality detector for universities

Some more features of our plagiarism checker

10+ years of operation

Our plagiarism checker has a long operational history. During this time we have succeed developing our software to university-grade plagiarism detection product.

#1 database of scholarly articles

Our users compare their documents with the largest database of scholarly articles from the best-known academic publishers.

Supports 129 languages

We are fully multilingual at heart and so are our algorithms. Our plagiarism checker supports 129 languages.

Free for education

We are happy to offer our plagiarism checker free for education. Teachers, lecturers, professors from schools and universities worldwide can use our services pro bono.

Features of our plagiarism checker

Types of plagiarism we detect

Our proprietary plagiarism checking algorithm is capable of detecting nearly all types of plagiarism:

Copy-paste plagiarism

  • Verbatim plagiarism
  • Self-plagiarism
  • Clone plagiarism
  • Recycle plagiarism
  • Mashup plagiarism
  • Aggregator plagiarism
  • Re-tweet plagiarism

Improper reference plagiarism

  • Invalid sources
  • Secondary sources
  • No sources

Paraphrase plagiarism

  • Mosaic plagiarism
  • Remix plagiarism
  • Hybrid plagiarism
  • Find-Replace plagiarism
Example of plagiarism detection

Plagiarism scores

Our scoring system offers several features to help make your document the absolute best it can be. With all of these features, as well as color-coding to alert you to any problems, you’ll be able to quickly edit and correct your document with ease.

Similarity score

All reports are provided with a similarity score. This score shows how many similarities exist in your documents.

Plagiarism risk score

This score shows you the risk of plagiarism in your document. The more similarities are detected, the bigger the risk of plagiarism. Our research has shown that this feature detects the risk of plagiarism by 94%. This is but one of many reasons why users love our system.


This score alerts you to the number of paraphrases in your document. A high paraphrase score may signal plagiarism. Be wary of a high paraphrasing score.

Improper citations

This score shows how many improper citations exist in your document. While it’s acceptable to use citations, they should not comprise the majority of your document. It’s also wise to verify the sources of any citations used, in order to avoid the risk of plagiarism.


This score shows the amount of “matched” parts in your document.

Example of highlighted plagiarism


Any kind of plagiarism found in your document will be highlighted for your review and correction. Paraphrases in orange, improper quotations in purple, and proper quotations in green. Even better, our plagiarism checker system will help you edit and correct your document.

Our plagiarism checker will place links to the sources on the matched parts in your document. These links allow you to correct any improper quotations, words, and paraphrases in your document. If you are confident that the quotations are placed properly in your document, a simple verification on your part will allow you to proceed with your document review and download.


Some citations may be recognized as plagiarism by teachers, so it is important to check your paper for correct citation in order to avoid any unpleasant surprises and negative consequences. Our plagiarism checker will let you know which citations are proper – they will be marked green. It will also mark purple all citations recognizable as plagiarism, so you will know to edit them. This is a unique feature – no other plagiarism detection system offers such a feature.

Our system’s state-of-the-art technology detects not only copy & paste plagiarism, but also paraphrase plagiarism. If you receive a high paraphrase score, it’s important to carefully and thoroughly review your document to avoid the risk of plagiarism.

Plagiarism checker citations


Even if your document is written in several languages, our multilingual system has no trouble detecting plagiarism. That’s why our plagiarism checker system is recognized as the national plagiarism detection system in several countries.


A vast, comprehensive database is the backbone of any plagiarism checker. We are proud to offer you checks against billions of documents.

Open database

The open database consists of any open documents that might be found on the internet and archived websites. This includes books, journals, encyclopedias, periodicals, magazines, blog articles, newspapers, and other openly available content. With the help of our partners, we are able to find documents that just appeared on the web.

The database of scholarly articles

In addition to the open database, we offer you the ability to check files against our database of scholarly articles. This database consists of more than 80 million scholarly articles from the best-known academic publishers.

Real-time check

Our real-time plagiarism checking algorithm is capable of finding similarities with articles that were recently published anywhere on the internet. This powerful feature provides a safeguard against plagiarism from fresh sources.

The algorithm is enabled for all the checks, except the Quick Check.

Frequently asked questions

Teachers ask

Our plagiarism checking service follows the rule that the user account belongs to the user. This means that the student needs to create the account by themselves. What you need to do is only to share the link to our plagiarism checker with your students and wait for them to register.

As soon as the document is uploaded to the service for plagiarism check, a student may share it with their educator. Sharing is totally free for students.

Every educator is granted a free account. Educator’s account lets teachers and professors check up to 20 documents and see up to 20 similarity reports per month for free.

Educator’s account includes plagiarism check with the internet database and the database of scholarly articles.

You can find the invoices following this link