That’s why it’s not just a choice; it's a necessity to have a proficient plagiarism detector in hand to combat plagiarism. However, let’s face the fact: finding a reliable tool to assess text originality is quite a challenging task. Why? Because many options are out there, making you confused and frustrated. 

So, we decided to help you in this regard and gathered the top 5 plagiarism checkers in this article. All of these are tested, reviewed, and trusted by millions of worldwide users. Let’s look at their features, offerings, accuracy level, and pricing. 

1. PlagiarismChecker.ai

PlagiarismChecker.ai is the top pick against originality issues in written content. ThisAI plagiarism checker allows you to check your text for plagiarism with high accuracy and speed. It deeply dives into the uploaded text and scans each sentence for unintentional similarities. And this whole process hardly takes twenty to thirty seconds.

By leveraging the potential of AI algorithms, the tool precisely compares input text with a vast collection of online and offline resources. Finally, it identifies plagiarism in all its forms, like verbatim, self, unintentional, paraphrased, and patchwork. The surprising thing is that it can catch even subtle traces of plagiarism without false positive results. 

Main Features:

• AI-powered plagiarism detection.

• Ability to check similarities via file URLs.

• The ad-free user interface for a smooth experience.

• Equally beneficial for academic and professional texts.

• Accurate indication of all matching sources.

• Downloadable, detailed plagiarism reports. 

Accuracy Test: 

To check the capabilities of this smart plagiarism detection tool, we copied a short blog post from the web and input it into this tool. Since it’s a very potent web utility, it accurately flagged all the content as plagiarized with no false identification. 

Pricing:

PlagiarismChecker.ai is both a freemium and a premium tool. With permission to check 1000 words freely for unlimited times, it offers convenience to those who can’t afford a paid version. But those who want to break this word limit will have to pay $4.99/week. 

2. DupliChecker

DupliChecker is also a leading plagiarism checker that allows you to detect copied content instantly. It’s one of the pioneers in the originality assessment domain. With years of experience and training over vast data, the tools easily manage to identify all the plagiarized parts. The best part? The detection quality remains the same with larger files. 

Moreover, it’s not limited to checking just English content. Instead, it has the ability to trace plagiarism in a wide range of languages. Currently, it supports over 15 widely used languages and plans to expand its capabilities to include additional languages in the future. 

Main Features:

• Allows detecting plagiarism through file URLs.

• Permits excluding any 5 URLs from detection.

• Offers an API for large-scale originality tests.

• Brings in files from Dropbox and Google Drive.

• Color-coded highlights for exact and partial matches.

• Multi-format report generation (Word and PDF).

Accuracy Test:

We ran the same content through this plagiarism detector as the above tool. Just like the previously mentioned tool, DupliChecker also stood out in the test. 

Here is its detection report that clearly tells that the provided text is 100% plagiarized:

Pricing:

Being an equally flexible tool, DupliChecker also provides users with an opportunity to perform countless checks of 1000 words each. For larger detections, it offers multiple paid plans, available on a weekly, monthly, and yearly basis. The most affordable plan for this tool costs $5/week. 

3. PlagiarismDetector.net

Another powerful tool to check for unintentional content similarities in your write-ups is PlagiarismDetector.net. It offers a mix of basic and advanced features to cater to all types of originality assessment needs. So, being a student, writer, or business professional, you can add this tool to your digital toolkit without any hesitation. 

Its intuitive interface, easy usability, and barrier-free access take you on a smooth journey of originality assessment. Additionally, it provides an in-depth plagiarism report, further enhancing your comfort level. As a result, you don’t feel bored or ignored while making an effort to ensure uniqueness in your files with the help of this tool.

Main Features:

• Displays match distribution with a clear pie chart.

• Supports citations in all commonly used styles.

• Gives a percentile view of matching text for each source.

• Integrated with an advanced plagiarism remover.

• Works with multiple mostly used file formats.

• Offers global support by processing multilingual text.

Accuracy Test:

Continuing the series of experiments, we tested the precision of PlagiarismDetector.net with the same content. Surprisingly, it also indicated the same plagiarized parts as others and found 3% partial matches, 97% exact matches, and 0% unique content. This means this tool is also worth relying on in terms of detection accuracy.

Pricing:

The free word count limit of this tool is similar to the previously mentioned plagiarism detectors. However, it differs in pricing and offers separate plans to students and institutions. It charges $8 for the basic plan, which gives you the freedom to check 1200 pages or 360,000 words. 

4. SmallSEOTools

SmallSEOTools offers a variety of writing-related tools, including a powerful plagiarism checker. It has been around for years and serves the online community with high-quality plagiarism detection. It utilizes the power of NLP and other advanced text processing algorithms to scan text, make comparisons, and identify plagiarized sections. 

Since it’s been living up to its promises for a long time, it claims to be 100% accurate in its assessments. That’s the thing that attracts millions of users, including students, teachers, writers, and content creators from all around the world. 

Main Features:

• Deep search technology for advanced detections.

• No requirement for sign-up or user account.

• Integration with cloud storage and AI algorithms.

• Real-time comparison with millions of web pages.

• Can identify duplication in both AI and human content.

• Multiple input options with URL inclusion feature.

Accuracy Test:

The results of SmallSEOTools are also worth appreciating. The tool delved deeper into the content and identified all copied content as plagiarized. This extensive level of precision is what makes it a top plagiarism detector. 

Pricing:

SmallSEOTools comes with a weekly subscription fee of $5.90/week and $9.80/month. However, if your needs are higher, like a professor who has to check a lot of assignments for plagiarism, you can opt for its other diverse packages. 

5. Check-plagiarism.com

Check-Plagiarism.com also deserves to be included in the list of top plagiarism checkers for many reasons. It has been specifically made to meet your basic originality assessment needs. As you land on its web page, a clearly visible input box at the top, without any clutter in the surroundings, welcomes you. 

All you have to do is copy-paste the intended content there or click the file upload button to insert the entire document. Within seconds, all the duplicate parts appear on your screen, along with the matching sources. This ensures that you timely fix plagiarized sentences before they create any problems. 

Main Features:

• Can check plagiarism in 13+ languages.

• Sentence-based assessment of text.

• A reasonable free version is available.

• Allows comparing text with a particular source.

• Doesn’t store your uploaded content.

• Offers a built-in plagiarism report-sharing option.

Accuracy Test:

This time, we included some unique parts in the same content we used previously to try something different. You can see the results below and analyze that Check-Plagiarism.com didn’t flag unique parts as plagiarized. This shows the tool is smart enough to tell the difference between copied content and original writing.

Pricing:

Along with providing you with a free version, this plagiarism detector also allows you to go pro weekly for just $4.99. This facility is particularly for those who have to check plagiarism frequently, like on a daily or weekly basis. 

To Sum UP

In short, all the above-mentioned originality assessment tools could prove to be helpful companions in the fight against plagiarism. Some of them let you input your content using the file upload option; a few support link insertion, while others require you to simply copy-paste your text. Apart from that, they differ in multiple things, but one thing is common among all of them: detection accuracy. On top of that, all of them offer a free version. So, explore them all and figure out which performs well for your needs.