Every writer aims to craft content that's uniquely theirs. But with the internet overflowing with information, the fear of unintentional plagiarism looms large. I get it! Sometimes, it can be difficult to distinguish between drawing inspiration from others and unintentionally infringing on their work.
Manual checks for plagiarism take so much time and may not catch all instances of self-plagiarism or accidental plagiarism. Thankfully, plagiarism checkers exist to maintain originality in your writing and guard you against potential reputational damages, academic setbacks, and legal issues.
To help you find the right tool, I collaborated with our in-house plagiarism checker expert, Marina , to evaluate 42 plagiarism detection tools.
Forget sifting through endless reviews! We've compiled an in-depth list of leading plagiarism checker software solutions designed to preserve your original content. Keep reading to find the best fit for you!
At G2, we rank plagiarism checkers using a proprietary algorithm that considers customer satisfaction and market presence based on authentic user reviews. Our market research analysts and writers (Marina and I, in this case) spend weeks testing solutions against multiple criteria set for a software category. We give you unbiased software evaluations; that's the G2 difference! We didn’t accept payment or exchange links for product placements in this list. Please read our G2 Research Scoring Methodology for more details.
Grammarly is a cloud-based writing assistant that checks grammar, spelling, punctuation, and plagiarism. It also offers suggestions for clarity and engagement. Grammarly easily integrates with various platforms, so you can polish your writing wherever you work.
Marina and I liked the Grammarly extension. It checks your writing as you work in content tools like HubSpot and Google Docs. The extension now also provides artificial intelligence (AI) assistance for generating ideas and improving written content, a great addition.
“ I like Grammarly Business because it helps me improve my written communication in various ways, such as identifying and correcting grammar and spelling errors, detecting plagiarized content, and providing suggestions for improving tone and style. It's also user-friendly and integrates well with other commonly used tools, making it a convenient and effective writing assistant for teams and individuals.”
“The plagiarism checker tool needs to be more sensitive for us to rely on it as our sole tool.”
Interested to find out how Grammarly measures up against other solutions? Check out the top 10 Grammarly alternatives .
Feedback Studio (Turnitin) plagiarism detection software shines in academic institutions. It checks students' work for potential plagiarism and generates similarity reports. Educators have made it popular for its help in encouraging proper citation practices and maintaining academic integrity.
The QuickMarks™ feature for leaving drag-and-drop comments stood out to us. It cuts way back on grading time.
“ It’s simple to use, flags any plagiarized text immediately, and generates reports up to 40 pages long while still detecting copyrighted material, including AI-generated content.”
“Like most technologies, it's not going to catch everything. Plus, some flagged assignments might be legitimate student work, so double-check, especially if multiple students were allowed to work together to create a thesis or topic sentences.”
Can't decide between Feedback Studio and Grammarly? Check out our side-by-side comparison of Feedback Studio and Grammarly to discover which option fits you best.
Copyleaks Plagiarism Checker , an AI detector and online plagiarism checker performs cross-language plagiarism checks in 30 languages, including English, Spanish, Portuguese, German, and Chinese. It also uncovers paraphrasing and hidden character tricks, schedules recurring scans, and sniffs out AI-generated text. This AI plagiarism checker offers a custom reporting experience and various resources for in-depth analysis.
We liked Copyleaks’ inclusion of optical character recognition (OCR) technology for directly examining text from an image to detect instances of plagiarism.
“ I appreciate Copyleaks' versatility in handling various content types. Whether it's academic papers, business documents, or creative writing, the tool's capability to analyze diverse content ensures that we maintain originality across our projects.”
“While other competitors offer a free trial, Copyleaks' free version has limited functionality, such as restricted number of scans or depth of analysis, restricting full exploration of its capabilities.”
Can't decide between Copyleaks Plagiarism Checker and Feedback Studio (Turnitin)? Check out our side-by-side comparison of Copyleaks Plagiarism Checker and Feedback Studio (Turnitin) to discover which optionfits you.
PlagiarismCheck.org is an essay checker that educators in K-12 and higher education use to detect plagiarism. It compares submitted text against a vast database of sources, such as academic papers, web pages, and publications. It also integrates with various educational tools and has options for customization to suit institutional requirements.
Marina and I thought the integration with various learning management systems made workflow really smooth – a definite plus.
“ Having a Google Chrome Extension saves time and allows me to check everything right in the browser window. Our content is protected from any kind of plagiarism and AI tricks.”
“Wish there was a mobile app because sometimes a crisis happens unexpectedly when you are not near the desktop.”
Thinking about PlagiarismCheck.org and Copyleaks Plagiarism Checker? Check out our side-by-side comparison of PlagiarismCheck.org and Copyleaks Plagiarism Checker to discover which option fits you.
ProWritingAid comes with tools for grammar checking and plagiarism detection. It helps refine the voice and improve clarity by providing in-depth feedback on style, readability, and sentence structure.
We like the inclusion of a custom database so users can create a library of reference documents to consult when checking for plagiarism.
“ Of the many editing programs I've tried, I found PWA the easiest and most thorough. I send all my manuscripts through it and depend on PWA to catch my errors and omissions. It works fast, and it not only fixes my writing, but I learn from their hints as well. I can't think of another editing aid as efficient and easy to use.”
“Being an artificial intelligence, it can't replace the human eye entirely. Some of the suggestions or corrections are simply wrong, and the program won't always get the small nuances of what you've written. You still need your own judgment and knowledge for a good number of suggestions.”
Can't decide between ProWritingAid and PlagiarismCheck.org? Check out our side-by-side comparison of ProWritingAid and PlagiarismCheck.org to discover which option fits you.
Noplag is a versatile writing assistant with plagiarism detection at its core. It helps with essays, articles, dissertations, research papers, book reviews, and case studies. Access Noplag via web browser, mobile app, or desktop app. Its key features include customizable plagiarism detection settings, an online editor with integrated grammar and style checking, citation support, and template writing.
What stood out about Noplag is its outline templates, which are a great starting point for content like cover letters, CVs, articles, and essays.
“ It’s very easy to use, and has an intuitive user interface and a great customer support team. It easily identifies plagiarism.”
“Noplag is text-based and can’t detect plagiarism in non-text content.”
Can't decide between Noplag and ProWritingAid? Check out our side-by-side comparison of Noplag and ProWritingAid to discover which option fits you.
WriterZen positions itself as a one-stop shop for SEO content creation, offering tools for topic discovery, plagiarism checking, keyword analysis, and writing assistance. It enhances online brand presence and simplifies workflows from research to execution and project management.
Marina and I found the itemized reporting feature really helpful. It generates reports that break down plagiarism rates by specific type.
“WriterZen has been a great way for me to save time and still get the content I need. With their easy-to-understand features, I was able to find the keywords that I need to rank for in minutes. Plus, the plagiarism checker is a bonus! The UI is pretty, too. The direct data pulled from Google made it easier for me to visualize my ideas. Thank you for creating this wonderful tool! ”
“Some users have expressed concerns about WriterZen's pricing structure, which may be prohibitive for smaller businesses or individuals. Additionally, some users have noted that WriterZen's integrations with other tools are somewhat limited, which may be a drawback for those who rely on a wide range of software solutions. Finally, there is a bit of a learning curve to fully utilize all of WriterZen's features, which may be challenging for some users.”
Can't decide between WriterZen and Noplag? Check out our side-by-side comparison of WriterZen and Noplag to discover which option fits you.
Marina and I also found these great tools during our research.
Accuracy, database size, report clarity, and analysis stand out as non-negotiable features for plagiarism checkers. Look for components that will improve your workflow, such as ease of use, batch processing, and integration with your preferred writing software. Remember that pricing plans vary significantly, so find one that suits your budget and usage needs.
We hope this compilation of the best plagiarism checkers will help you find the right tool to write with confidence.
AI-generated content has the potential to do more harm than simply bore readers. Make sure your content is engaging and legal with AI content detection tools.
Harshita is a Content Marketing Specialist at G2. She holds a Master’s degree in Biotechnology and has worked in the sales and marketing sector for food tech and travel startups. Currently, she specializes in writing content for the ERP persona, covering topics like energy management, IP management, process ERP, and vendor management. In her free time, she can be found snuggled up with her pets, writing poetry, or in the middle of a Netflix binge.
