Plagiarism Checker Software

Best Plagiarism Checker Software include:

Quetext, Dupli Checker (, Copyleaks, Plagiarism Detector (, Copyscape, PlagScan, from Ouriginal, Noplag, Turnitin Originality, Unicheck and Turnitin iThenticate.

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Grammarly in San Francisco provides its grammar improvement and AI driven writing assistance platform, available on free or paid premium and business plans.

Paper Rater (

Paper Rater, or, is a proofreading and grammar checking writing tool available free online or via professional editions. It was acquired and is now supported by Barnes & Noble Education (BNED), since August 2018.


ProWritingAid is a smart writing assistant, providing personalized advice on writing and plaigarism checks, from the company of the same name in Wheatley.

Dupli Checker (

Dupli Checker (or just is a free plagiarism checker (supported by the site's ads) and SEO check (e.g. keyword density, etc.) tool suite.


Quetext is a plagiarism-detection software from the small company of the same name in Kansas City, boasting over 2 million teachers, students, and professionals worldwide as users. By combining its DeepSearch technology with what the vendor describes as clear and engaging feedback,…


Copyscape is an online plagiarism detection solutions. Copyscape's products boast millions of website owners worldwide to check the originality of their new content, prevent duplicate content, and search for copies of existing content online.


Copyleaks offers AI-based text analysis, dedicated to cultivating secure environments that encourage the sharing of ideas and empower authenticity. Copyleaks' suite of products to identify potential plagiarism and AI-generated content, provide full transparency around responsible…


WhiteSmoke Software offers English writing technologies, with a focus on products that enhance and correct grammar, spelling, and writing style. WhiteSmoke products are based on natural language processing (NLP) technology, featuring artificial intelligence algorithms for text analysis.…

Plagiarism Detector (

Plagiarism Detector ( is a free online plagiarism checker with paid options supporting bulk checks with additional features. It is supported by Content Arcade headquartered in Pakistan with offices in the UK.


Noplag assists in checking for plagiarism (intentional and unintentional), character replacement, patchwork plagiarism, synonyms plagiarism, grammar and spell checking. Noplag Citation Assistance and Noplag text SEO analyses makes sure content is SEO friendly.

PlagScan, from Ouriginal

PlagScan, now from Ouriginal (the company formed from the merge of PlagScan and Urkund in September 2020), is a browser-based web service that investigates the authenticity of documents and detects plagiarism. The vendor states the service is compatible to all common file formats…


Unicheck is a professional and comprehensive software for preventing plagiarism.


Rytr is an AI-powered writing tool that helps create content in just a few seconds, for blogs, emails, social media ads, and other use cases, from the company of the same name in Walnut, California.

0 reviews is an AI-powered article writer software and 50+ content generation use cases to produce copy for blogs, websites, and social automatically generates and optimizes content to help users save time by letting a system create articles from a simple description.…

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GPTZero is a platform for detecting AI-generated content. Its AI detection is trained to detect ChatGPT, GPT4, Bard, LLaMa, and other AI models.

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Originality.AI provides a toolset that includes Generative AI, to help Website Owners, Content Marketers, Writers, Publishers and any Copy Editor to publish with integrity. offers key features for web publishers: AI Detection: Its AI detection tool boasts 99% accuracy…

25 is a plagiarism checker site that provides plagiarism reports. Through leveraging advanced algorithms and an extensive database, aims to ensure thorough scanning of texts to identify any instances of plagiarism.

Videos for Plagiarism Checker Software

Unicheck, NoPlag, and Turnitin: Top 3 Plagiarism Checkers for Writers, Students, and Teachers
Whether it's students looking to be sure they're properly citing or teachers looking to check students' work or writers looking using templates and citation tools to improve their work, plagiarism checkers often do more than what they may seem. These are the best options based on specific use-cases.

Learn More About Plagiarism Checker Software

What is Plagiarism Checker Software?

At a basic level, plagiarism checker software scans through a body of text to see if there are instances of plagiarism within the written content. Free and paid plagiarism checkers alert the writer to whether or not their text has duplicate content (a.k.a. plagiarized text) within a body of text. Most tools cross-reference public websites and web pages to help identify instances of plagiarism. Some plagiarism checker tools also leverage a large online database of published work they use for cross-referencing, this is especially true for plagiarism detection software designed for academic use cases.

More advanced paid plagiarism checkers offer other features like alerting the writer to whether or not a section of their writing requires a citation, providing citation formatting guidelines or tools, and giving a document a score based on how original the content is. Certain advanced tools offer plagiarism checking in multiple languages and use AI technology to help identify identical and paraphrased content.

Some vendors offer plagiarism checking software as part of a larger suite of writing and proofreading tools. For example, Grammarly provides users with a plagiarism checker along with grammar, spelling, syntax, writing style, and text sentiment features.

How Do Plagiarism Checkers Work?

Depending on the tool, individuals can check to see if their writing contains plagiarized text in a few different ways. Most tools allow users to copy and paste the text they wish to check for plagiarism into an interface on the plagiarism checker website. Many tools also allow users to upload a word document or other accepted file format for scanning. Some paid tools provide users with an extension they can install in their browser that they can use to dynamically check their writing as they type.

For organizations that are looking for a plagiarism detection tool to use across the whole company, some vendors offer tools that can be directly integrated with a business website to scan for instances of plagiarized or paraphrased content. This includes the content published on the website, blog content, and sometimes even coding assignments.

Plagiarism Checker Software Use Cases

A primary use case for plagiarism checker software is in the world of schooling and academia. Students, teachers, and administrators in secondary schools and higher education institutions (colleges and universities) use these tools.

However, these tools are frequently used outside of education and academia as well. Anyone who writes as part of their job In the corporate, nonprofit, and government sectors can use these software products too. For example, people who either write full-time or are responsible for publishing content will want to ensure the content they produce is not accidentally plagiarized. These types of people may be:

  • bloggers

  • content creators

  • contract writers

  • professional writers

  • SEO experts

  • marketers

Plagiarism Checker Software Features

Free plagiarism software is often very simple and may only allow users to either copy and paste or upload text to be scanned for plagiarized content. However, most paid tools will offer the following features:

  • Text scanning

  • Plagiarism alerts

  • Document to document comparisons

  • Authenticity/originality scoring

  • Ability to copy & paste text to be scanned

  • Document/file upload

  • Browser extension

  • APIs

Some plagiarism detection tools are embedded within a larger suite of writing tools. These suites typically include the following features:

  • Spell checking

  • Grammar checking

  • Sentence syntax recommendations

  • Writing style and tone identification

  • Word choice suggestions

Plagiarism Checker Software Comparison

Before deciding to start using a free or paid plagiarism checker tool, consider these three key factors:

  1. Cost of the tool: are you looking for a no-frills free tool or a more advanced paid one? Free tools are great for individuals that need a quick and easy way to check their work for plagiarism, though they typically do not offer additional features. On the other hand, paid tools are ideal for someone who writes frequently, or for businesses looking for a suite of writing tools to use for their whole business. Paid plagiarism checker software often offers advanced features such as spelling and grammar checks, calculating the authenticity score of the document, and the ability to integrate with websites and third-party applications.

  2. Ease of use: how user-friendly is the tool? Especially if you’re looking for a quick and easy way to check your writing, having an easy to use tool is essential. On TrustRadius, products have a ‘usability’ score on their product scorecard that you can check to see how user-friendly a certain product is.

  3. Scope: are you looking for a standalone plagiarism checker tool or a more comprehensive suite of writing and proofreading tools? Free and cheaper tools will often provide basic plagiarism detection features, while more expensive tools will offer more advanced writing improvement features that go beyond just plagiarism detection.

Pricing Information

There are many free and paid plagiarism detection tools available. Free tools can be great for individuals that need to check their writing for plagiarism in an ad hoc manner, while paid tools are better suited for individuals who write professionally or organizations looking for a solution that can be used across their business.

Some free tools to consider include:

Pricing for paid plagiarism checker and writing tool suites can vary based on a few key things: the number of pages that need to be checked, the number of words that need to be scanned, and the number of users. Most solutions charge either a monthly or annual fee. Prices can range from $20 per month (for between 200 - 3,000 pages and 72K - 800K words) up to $100 or more per month for over 100K pages and millions of words.

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Frequently Asked Questions

Why should you use plagiarism checker software?

Plagiarism checker software can help individual writers, students, teachers, and businesses protect themselves and their writing against the risk of plagiarism. Publishing text that has been plagiarized is not only unprofessional but is also illegal.

Of course, sometimes it can be hard to remember if what you just wrote is truly original or was informed by someone else’s writing and requires a citation. Plagiarism detection software can help users make sure their writing does not include any instances of plagiarism, protect them from legal risk, and help improve the overall quality of their writing.

Which is the best plagiarism checker software?

Some of the most popular plagiarism checker software include:

To learn more about the different types of tools available and see other options, visit TrustRadius’ Plagiarism Checker Software page.

What are the best free plagiarism checker tools?

There is a wide range of free plagiarism checker tools available online, some popular tools include:

How much does plagiarism checker software cost?

Free plagiarism checker tools are great for individual users that are looking for an easy way to check their writing for plagiarism. Paid tools offer more robust and advanced features and are usually better-suited for professional writers, academic professionals and students, and businesses that need a comprehensive writing improvement solution.

Costs can range from $20 per month up to $100 per month, depending on the number of pages and the number of words that need to be checked for instances of plagiarism.