The Best Plagiarism Checkers Going Toe to Toe

Plagiarism is not something to be taken lightly. Copying others’ work and ideas and trying to present them as your own is among the worst academic misconduct you could commit. Most schools and professional organizations will use a plagiarism checker tool to assess your paper, which is why you should use one, too. 

The best plagiarism checkers will catch instances of direct and accidental plagiarism, paraphrasing plagiarism, even patchwork plagiarism. They’ll understand the difference between copied work and commonly used phrases, and they will provide a comprehensive report on your text. 

The worst ones will do none of the above. 

Therefore, if you want to ensure that your papers are plagiarism-free and authentic, you’ll need to find an effective tool with the right set of features. Take a look below to find the best plagiarism software you should start using. 

Grammarly Overview 

Grammarly is one of the most popular tools available on the market. Launched in 2009, it’s accumulated over 30 million users in a little over a decade. 

It has a powerful plagiarism checker that goes through a vast database of 1.7 billion websites to ensure that your work has no instances of plagiarism, even if it’s accidental. AI-powered and intuitive, it’s among the best plagiarism software you could use.

Price 

As an editor, first and foremost, Grammarly has a free version of its editing software, which corrects spelling, grammar, and punctuation mistakes. If you want its plagiarism checker, you’ll need to pay. 

Plagiarism detection is included in Grammarly’s Premium plan, which starts at $12 a month, and its Business plan, which starts at $12.50 a month per user. 

User-friendliness

Grammarly has a sleek, user-friendly design that’s easy to get accustomed to. You’ll have a clear overview of your text, with every instance of plagiarism adequately highlighted. You’ll get a plagiarism score, expressed in percentages, and you’ll have a list of the original sources listed on the right-hand side. 

Functionality

Grammarly has valuable features that will help you perfect any type of text you have. You can choose your writing style, adjust writing goals, such as the formality level, audience type, tone, and intent, and more. Since it’s primarily an editing tool, you’ll gain full insight into your grammar, spelling, and punctuation mistakes and even receive writing suggestions. 

Target users

Grammarly is popular among virtually every type of writer – students, teachers, marketers, copywriters, authors, and researchers. 

Reliability 

Grammarly’s plagiarism checker tool is reliable and effective. It catches over 95% of copied text, whether it’s copied from online or offline sources. It’s partnered with ProQuest to extend its database and make its plagiarism checker all the more trustworthy. 

Pros 

• 100,000 character limit; 
• Database of 1.7 billion websites; 
• Quick response time; 
• User-friendly. 

Cons 

• Functional only in English; 
• Expensive. 

Quetext Overview 

Quetext has been in the industry for over two decades, establishing an impeccable reputation among writing professionals. 

It has a DeepSearch tool that performs contextual analysis and catches even instances of paraphrasing plagiarism that can be challenging to detect. It’s fast, reliable, and one of the top plagiarism checker tools you could use. 

Price 

Quetext has a generous free version that allows you to check up to 2,500 words a month. You can upgrade to a Pro version for $9 a month to increase the word count to 100,000 and unlock additional features. 

User-friendliness 

Quetext prioritizes simplicity. The platform is clean and intuitive, and it shouldn’t take more than a few minutes to get adjusted to it. 

Functionality 

Quetext has an array of useful features, including ColorGrade feedback, which highlights your text in different colors, depending on whether it’s a word-for-word copy or a “fuzzy” attempt at paraphrasing. You can also benefit from its citation assistant, detailed plagiarism reports, and customizable URL exclusion. 

Target users 

Quetext is primarily used by teachers, students, and copywriters. 

Reliability 

Due to its proprietary DeepSearch technology, Quetext offers excellent reliability. Its plagiarism checker is accurate, and the platform as a whole is safe and discreet. 

Pros 

• A free version is available; 
• Citation assistant; 
• ColorGrade feedback; 
• Customizable URL and domain exclusion. 

Cons 

• Advanced features only come with the Pro plan; 
• No grammar check. 

Copyleaks Overview 

Copyleaks is a relative newcomer in the industry, founded only in 2015. Still, its young age hasn’t prevented it from being included in our list of the best plagiarism checker software. It uses AI-based algorithms to ensure the utmost accuracy. 

Price

Copyleaks has customizable pricing plans that depend on your unique needs and preferences. If you’re in academia and education, the cheapest option will start at $9.16 a month for 300,000 words a year. If you’re in business and enterprise, pricing starts at $8.33 a month for 300,000 words a year. 

Those who need to check over 30 million words a year will need to create a custom plan that suits them best. 

User-friendliness

Copyleaks has somewhat of a learning curve, making it more challenging to get used to. It appears a bit crowded when you first start using it since you’ll immediately get the scan information such as the number of results found, the number of similar words, and more. Still, it should take you no more than a couple of uses to get accustomed to it. 

Functionality

Copyleaks has extensive functionality, allowing you to receive a full plagiarism report and an automated grade. It even has a code plagiarism checker that’s quite a novelty in the industry. 

It uses AI and machine learning technology to enhance its capabilities and improve performance over time. 

Target users

The Copyleaks tool is the most popular among professors and business professionals. Since it’s a more complicated tool, it’s rarely the first choice for students or infrequent writers. 

Reliability 

The plagiarism checker tool has multi-layered detection capabilities, crosschecking your work against millions of web pages, academic journals, private databases, and more. It can catch the most inconspicuous instances of plagiarism, making it highly effective in academia and business environments. 

Pros

• Available in over a hundred languages; 
• Code plagiarism checker; 
• Massive database; 
• Available on Android and iOS. 

Cons

• Expensive; 
• Cannot export reports. 

Edubirdie Overview

Edubirdie is more than a top plagiarism checker tool. It’s a writing assistance platform that offers an array of services, including essay creation, editing, proofreading, ghostwriting, citation, and, of course, plagiarism detection. 

It’s popular among high school and college students, and its pricing reflects that. 

Price

Edubirdie has a free plagiarism checker that’s available to everyone. However, if you want to make use of some of EduBirdies' other services, you will have to pay. Document editing starts at $7 per page, while writing starts at $13.99 per page, depending on your paper’s length and unique requirements. 

User-friendliness

While it seems slightly crowded, Edubirdie is quite easy to use. You can use the drag-and-drop option to start checking your document, or you can upload PDF, .rtf, .doc, .docx, or .txt files right from your computer. 

You will have to register, but you can use your Google or Facebook account to do so, so the whole process of checking your document takes only a few minutes. 

Functionality

For a free plagiarism checker, Edubirdie offers excellent functionality. Upload files of any type, paste your document title and receive a detailed plagiarism report within seconds. 

Of course, if you aren’t satisfied with your results and need to improve your score quickly, you can always use the platform to hire a professional writer who can do the paper for you. 

Target users

Virtually anyone can use Edubirdie’s plagiarism checker, but the tool remains the most popular among high school and college students and copywriters. 

Reliability

While it doesn’t use any particularly advanced technology, Edubirdie has surprising reliability. It boasts high accuracy, ensuring that your paper is authentic and free from any instances of direct or paraphrased plagiarism. 

Pros

• Free to use; 
• Unlimited page count; 
• Quick results; 
• Reliable citation generator. 

Cons

• Results can be flawed if you select the wrong paper category; 
• If the site is overcrowded, it will take a while to load. 

Small SEO Tools Overview 

Small SEO Tools was established in 2010 and quickly became the go-to platform for copywriters and marketers. As its name would suggest, it offers premium SEO tools for small businesses and individuals who need all the help they can get to improve their search engine results page (SERP) ranking. 

However, its popularity among students, teachers, and copywriters grew over the past few years due to its extensive editing features and advanced plagiarism checker tool. 

Price

Small SEO Tools offers a free plagiarism checker for up to 1,000 words. However, if you need more comprehensive functionality or a more advanced plagiarism detection solution, you can upgrade to paid plans. 

Small SEO Tools Pro pricing starts at $9.80 a month for up to 25,000 words per month. You can customize your plan to ensure that it meets all your needs. 

User-friendliness

The Small SEO Tools plagiarism checker is easy to use. You can copy-paste your text directly into the tool or upload documents of any type to receive a comprehensive report. You don’t need to register or create an account to start using this plagiarism checker tool, so you can get started immediately. 

Functionality

Small SEO Tools has an abundance of features that are primarily designed for SEO professionals. Besides its plagiarism checking services, it offers a paraphrasing tool, a reverse text generator, and an image-to-text converter. It has image editing tools, keyword tools, backlink tools, and much much more. 

Target users

As mentioned, this one is the most popular among small SEO professionals. However, its plagiarism checker and text editing tools are becoming ever-more popular among students. 

Reliability

It works somewhat more slowly than some of the best plagiarism checker software mentioned on this list. However, it’s as reliable as any of them. It compares your text with millions of online and offline sources to deliver accurate results.  

Pros

• Free plagiarism checker for up to 1,000 words; 
• Extensive functionality for SEO experts; 
• Easy to use; 
• Deep search for more reliable results. 

Cons

• Works slowly; 
• More useful to SEO professionals than to writers. 

PrepostSEO Overview 

Like the tool above, PrepostSEO is mainly used by SEO professionals and marketers. Still, since it does offer a plagiarism checker, it’s gaining popularity among writers of all kinds. 

The entire platform has over 20 valuable tools, from text summarizers to domain age checkers, links extractors, text-to-image converters, and random word generators. Its plagiarism detection tool is easy to use and effective on direct plagiarism. 

Price

PrepostSEO plagiarism checker tool is available to users for free but with some limitations. Visitors who aren’t registered are limited to 1,000 words per month, while registered free users get up to 1,500 words. 

If you want to increase your word limit, you’ll need to upgrade to one of the premium plans – Basic for $50 a year and 5,000 words a month, Standard for $150 a year and 15,000 words a month, or Company for $350 a year and 25,000 words a month. 

User-friendliness

PrepostSEO’s plagiarism checker is simple and user-friendly. Use the drag-and-drop option to upload a file of any type, or simply copy and paste your document to get started. There’s virtually no learning curve, and it takes just a few seconds to get the results. 

Functionality

PrepostSEO’s plagiarism checker is a simple tool with basic functionality. However, the platform as a whole has dozens of unique features that can help you improve any text with ease. You will need to upgrade to a paid plan to use most of the features, but it can be well worth it, especially if you need to improve your SEO. 

Target users

PrepostSEO is popular among SEO professionals, digital marketers, and students.  

Reliability

PrepostSEO doesn’t have an extensive offline database, so it’s not as accurate as some other tools we’ve mentioned. Still, it catches most instances of direct plagiarism and compares your document to millions of online sources. 

If you’re unregistered and using the free version, you will need to disable your ad blocker to check your document. Once it’s disabled, you’ll receive your results quickly. 

Pros

• Plagiarism checker is free; 
• User-friendly; 
• Available in multiple languages; 
• Fast. 

Cons

• Limited word count, even with paid plans; 
• Too many ads with the free version. 

Fixgerald Overview 

Last but not least is Fixgerald review. Although it’s a younger platform, it’s proven to be the most popular among writing professionals and students alike. The platform is easy to use, with no limitations and no disruptive ads. 

Fixgerald uses cutting-edge plagiarism software with an extensive database to cross-reference your papers against millions of sources, online and offline.

User-friendliness

Fixgerald has a clean, streamlined design and intuitive features. It won’t take you more than a minute to find every option you need and start checking your work. There are no intrusive ads to get in your way and no popups or widgets that could distract you. 

Functionality

What makes this tool one of the best plagiarism checker solutions is its extensive functionality. Copy and paste your text (or upload a file from your computer), check it for plagiarism, and simultaneously get grammar and spelling feedback. You can use live editing to change your text directly in the plagiarism checker and see how your score improves. Repeat the process as many times as necessary until you get 100% plagiarism-free and 100% error-free text. 

Target users

Fixgerald was designed with students and copywriters in mind. It’s especially popular among college students and researchers who need to reference their course material without copying it word-for-word. 

Reliability

Fixgerald uses advanced plagiarism detection software that can catch virtually any form of plagiarism there is. It’s accurate, fast, and effective, helping you improve your writing in a few clicks. 

Furthermore, its informative blog posts will help you avoid common writing errors and plagiarism mistakes in the future.

Pros

• No intrusive ads;
• User-friendly;
• Check text grammar;
• None of your information is stored on the site. 

Cons

• Plagiarism check can take up to 7 minutes, depending on the length of text; 
• You can only check 10,000 characters at a time. 

Final thoughts 

Using the best plagiarism checker is a must for any reputable writer in academic and professional settings. Even if you don’t intend to copy your sources, accidental plagiarism can easily happen and ruin your career. 

If you want to stay on the safe side and ensure the utmost authenticity of your work, start using a plagiarism checker today.