Best Plagiarism Checkers Tools and Software of 2023- Which of These Online Tools will be Best for You?

Looking for online anti-plagiarism tools to check for duplicate content?

Look no more!

My guide to the best plagiarism checkers in 2023 shows you which apps are the best and most recommended.

Let’s get started!

#1- Originality.ai Plagiarism Checker App

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Originality.ai is the best AI content detection tool on the market (you can read my Originality.ai review here to learn more about it).

But Originality.ai is also an excellent premium plagiarism checker.

Here’s how to check for duplicate content with Originality.ai.

First, go to Originality.ai (open an account first) and in the left sidebar go “Start a New Scan“:

Second, give the document a title and paste the content you want to check for plagiarism. Then deselect “Detect AI” so that Originality.ai checks only for duplicate content.

For my test here in this article, I will take a few hundred words from my Jasper AI coupon code article to test it for plagiarism. I expect Originality.ai to find my site and article as the source.

And it did!

Take a look:

Originality.ai plagiarism checker is the best tool on this list, and that’s why it’s at the top of this article.

The tool is affordable too, which you can see below.

Originality.ai Plagiarism Checker Pros (What I Like)

Originality.ai Plagiarism Checker Cons (What I Don’t Like)

Who is Originality.ai Plagiarism Checker Best for?

Originality.ai is my tool of choice when it comes to checking for duplicate content. I also use it for AI content detection and this app hasn’t let me down yet.

I recommend Originality.ai to all serious web publishers and bloggers who care about keeping the integrity of their blogs and online properties.

Originality.ai Plagiarism Checker Pricing

Originality.ai pricing model is very simple.

You pay with credits inside the platform. Each credit costs you 0.01c and each credit lets you scan 100 words of content for either AI content or plagiarism.

That means  if you want to check 100 words of content for both content duplication and AI content that’d cost you 0.02c

Number of Credits	Price	Number of Words	Discount	Discount Price
2K	$20	200 000	25% discount with coupon code "nikolaroza" (without quotes)	$15
5K	$50	500 000	No coupon and discount code for this pricing tier.	/
10K	$100	1 000 000	No coupon and discount code for this pricing tier.	/
25K	$250	2 500 000	No coupon and discount code for this pricing tier.	/
50K	$500	5 000 000	No coupon and discount code for this pricing tier.	/
100K	$1000	10 000 000	No coupon and discount code for this pricing tier.	/

Try Originality.ai today!

#2- Copyscape Premium Plagiarism Checker

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Copyscape is one best plagiarism checker tools on this list. It’s the tool I use regularly to check the originality of my content, my own and the one submitted by my freelance writers.

For example, here I checked my Jasper AI pricing guide in Copyscape and I found parts of my page duplicated on 2 pages, but one of them is my already published Jasper AI pricing tutorial.

The way Copyscape works is that once you submit content to it (URL or text content) it scans its huge internal database to look for content that is identical or very similar.

And it shows you the percentage of content that’s the same as someone else’s. Copyscape also highlights the plagiarized pards of the content you submitted, as you can see in the image below.

Copyscape also lets you check batches of pages for added efficiency (especially helpful for huge sites). All you have to do is go to Copyscape Batch Search in the header menu.

You can submit your XML sitemap or a list of URL’s (up to 10 000 entries).

Copyscape Pros (What I Like)

Copyscape Cons (What I Don’t Like)

Who is Copyscape Plagiarism Checker Best for?

Copyscape is best for serious bloggers and web publishers who make money from their websites and who can’t afford the dangers duplicate content brings to search engine rankings.

If that’s you, Copyscape is an excellent investment for your site’s success and future.

Copyscape Plagiarism Checker Pricing

Copyscape is an affordable anti-plagiarism tool. You pay 3c for 200 words of scanned content+ 1c per 100 words from then on.

This is very affordable, I paid $10 6 months ago, and I still haven’t spent all my credits.

Try Copyscape today!

#3- Grammarly Premium Plagiarism Checker

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Grammarly is the world’s most popular AI writing assistant that checks your content style, grammar, spelling diction, punctuation errors, and all other types of writing errors.

Grammarly has an excellent extension for Chrome which enables Grammarly anywhere you write, be it Slack, Discord, Evernote, Gmail (Grammarly for Gmail guide) Microsoft Word, etc.

Besides being a comprehensive AI writing assistant, Grammarly is also a powerful plagiarism checker and a worthy addition to this list. They use Proquest’s database with more than 16 billion pages (and that number growing daily) to check against your content and find matches. If they do you get alerted and you can take the appropriate action.

The Grammarly plagiarism checker is free to use, however, the drawback is that it won’t show you where and how you’ve plagiarized. So it’s kind of a teaser for Grammarly premium.

Here I tested some content from my blog and Grammarly correctly flagged it as duplicate. But then they urged me to open an account to see how much of the content is plagiarized and from which sources exactly.

So, if you aren’t just looking for a plagiarism check but need an AI assistant that can check your writing and all mistakes you can make, then go for Grammarly Premium (Grammarly plans and pricing explained) and you won’t regret it.  It’s an excellent tool.

Grammarly Pros ( What I Like)

Grammarly Cons (What I Don’t Like)

Who is Grammarly Plagiarism Checker Best for?

Because Grammarly’s anti-plagiarism checker is available only with Grammarly Premium, I recommend Grammarly as a plagiarism checker only to those who want to buy Grammarly because it’s an excellent AI-powered writing assistant that happens to come with a decent premium plagiarism checker.

I don’t recommend you buy Grammarly just because you need a premium plagiarism tool.

Instead, go for better tools like Originality.ai instead.

Grammarly Pricing

Grammarly has 3 plans:

To learn more about Grammarly check out my Grammarly free trial, Grammarly student discount, and Grammarly military discount guides next.

#4- Quillbot Plagiarism Checker App

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Besides being a content paraphrase and summarizer, Quillbot is also a plagiarism checker.

To access it you need to go to Quillbot.com, then to Plagiarism Checker, and paste your content. Hit check and Quillbot will check your content for plagiarized content.

For example, here’s how I checked my Quillbot discount code tutorial.

You can see in the right sidebar Quillbot found several pages that copy parts of my page.

Good job.

Now, detecting clear content duplication is something all plagiarism checkers on this list can do, that’s easy and basic.

Let’s see how Quillbot handles content paraphrased with Quillbot (how meta!).

I’ll take a few hundred words from my guide on the best Quillbot alternatives and paraphrase it with Quillbot.

Now I’ll test the output Quillbot gave me with Quillbot Plagiarism Checker.

And here are the results:

As you can see, Quillbot paraphrased content passes as original inside Quillbot Plagiarism Checker.

You can look at this in two ways. First, Quillbot Plagiarism Checker sucks!

Second, Quillbot’s paraphrased content is undetectable.

Quillbot Plagiarism Checker Pros (What I Like)

Quillbot Plagiarism Checker Cons (What I Don’t Like)

Quillbot Plagiarism Checker Tool Pricing

Quillbot Plagiarism Checker is not a standalone tool and you get access to it with Quillbot paid plans (monthly, semi-yearly, and yearly).

When you purchase any of the Quillbot Premium plans (check out my Quillbot cost guide here), you get 20 pages to check for free. One page of content equals 250 words of content. This means you can check up to 5 000 words of content before you need to upgrade.

This isn’t that much when you think about it, but you can easily purchase more pages (though I don’t recommend it).

Additional pages cost for Quillbot Plagiarism Checker App:

Who is Quillbot Plagiarism Checker App Best for?

In my honest opinion, Quillbot Plagiarism Checker App is very expensive and not worth getting as there are many other equally good online plagiarism checkers.

However, if you already have a paid Quillbot account then you should use it to check for plagiarism until you run out of credits. Afterward, don’t buy new credits as it’s expensive. Instead, use a tool like Originality.ai which is equally good, and several times more affordable.

You can learn about Quillbot by reading my review of Quillbot, my Quillbot AI free trial, and my Quillbot pricing guide.

 Try Quillbot today!

#5- Scribbr Free Plagiarism Checker App

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Scribbr is a powerful plagiarism checker on this list. I say it’s powerful because it’s powered by Turnitin, premium service universities use to check their student’s work.

To start, go to Scribbor Plagiarism Checker’s official page and upload your document. Then agree to Turnitin’s terms of service (tick the checkbox).

Next, Scribbr will scan your document against 99.3 billion web pages, 8 million publications, and over 20 languages. And then you’ll get a result.

I gave Scribbr Word doc with my Originality.ai coupon code and sure enough Scribbr found the content to be duplicate.

Scribbr Plagiarism Checker Pros (What I Like)

Scribbr Plagiarism Checker Cons (What I Don’t Like)

Who is Scribbr Plagiarism Checker Best for?

I recommend Scribbr plagiarism checker to all those who need top notch plagiarism checking tool to scan their documents. Because Scribbr plagiarism tool is powered by Turnitin, their service is impeccable.

On the other hand, Scribbr is by far the most expensive anti-plagiarism tool on this list and I don’t recommend it 99% of bloggers and web publishers.

Sribbr Plagiarism Checker Pricing

Scribbr plagiarism checker doesn’t charge you by subscription but per document check. And the price depends on the length of the document you want to scan.

Try Scribbr plagiarism checker today!

#6- Unicheck Free Plagiarism Checker App

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Unicheck is an excellent premium plagiarism checker that also has a free plagiarism tool.

Here’s how it works:

First, take the content you want to check for duplication and paste it into the designated field. The word limit for the free version is 200 words.

In this example, I will take some content from my guide to duplicate content and SEO.

Second, press the “check it” button and wait for the results. Once the report is done you will need to create your free account with Unicheck to access the results.

Third, now you can access your results. In my example below you can see Unicheck correctly found duplicate content and correctly flagged the original page.

And that’s it.

Using Unicheck is very easy and intuitive and you won’t have any problems with it.

Unicheck Plagiarism Checker Pros (What I Like)

Unicheck Plagiarism Checker Cons (What I Don’t Like)

Unicheck Plagiarism Checker Pricing

Unicheck plagiarism checker is free!

Who is Unicheck Plagiarism Checker App Best for?

I recommend Unicheck’s anti-plagiarism tool to anyone who can’t afford a paid tool This duplicate content hunter is free, intuitive, and above all accurate.

#7- Duplichecker Free Plagiarism Checker App

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As the name suggests DupliChecker is an online plagiarism checker tool that can scan your content for intentional and unintentional plagiarism.

Here’s how to use it.

The limit of text you can check at once is 1000 words which is very generous. The drawbacks of Duplichecker is that the tool is slow at spitting results and also absolutely loaded with ads.

I use an adblocker which blocks most of the ads but take a look at how the page is inundated with them when you don’t use an adblocker.

The tools still work, but it’s very distracting.

Duplichecker Plagiarism Checker Pros (What I Like)

Duplichecker Plagiarism Checker Cons (What I Don’t Like)

Duplichecker Plagiarism Checker Pricing

DuplicChecker Plagiarism Checker has 3 payment levels:

• Weekly- $5/wk;
• Monthly- $25/mo;
• Yearly- $110/yr

Note: Duplicekcer premium plagiarism checker gives you up to 25 000 words to scan at once and the plagiarism checks are really deep and more likely to find duplicates on the web.

However, I don’t recommend you get a premium version of DupliChecker simply because a tool like Originality.ai is much more affordable and equally good, if not better (Originality.ai is the number #1 tool on this list of best plagiarism checkers. That is not an accident).

Who is DupliChecker Plagiarism Checker App Best for?

DupliChecker plagiarism checker app is a free tool and I recommend it to anyone who can’t afford a premium anti-plagiarism tool.

I don’t recommend Duplichecker to anyone who can afford a paid plagiarism checker. Pay a little, but get a lot of value.

The most affordable and also the best plagiarism checker on this list is Originality.ai. Pricing is 1c per 100 words checked for plagiarism. That’s very affordable.

Try Duplichecker plagiarizing app today!

Best Plagiarism Checker Tools and Apps for 2023 FAQ

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#1- What are Plagiarism Detection Tools?

Plagiarism detection tools are online apps that have access to large databases which they use to find matches between your text and the text that already exists on the internet.

Plagiarism detection tools are mostly used by universities to check for plagiarism in students’ homework and writing assignments.

But more and more bloggers and marketers use premium and free plagiarism checkers to scan the content they wrote or got from their freelance writers.

#2- What is the Best Free Plagiarism Checker?

The best free plagiarism checker is Duplichecker.

Read below how to use it.

First, go to Duplichecker.com

Second, paste the text you want to check.

Third, prove you’re human and not a robot.

Fourth, get your results.

The limit of text you can check at once is 1000 words which is very generous. The drawbacks of Duplicchecker is that the tool is slow at spitting results and also the tool is loaded with ads.

I use an adblocker which blocks most of the ads, but take a look at how the page is inundated with ads when you don’t use an adblocker.

The tools still work, but it’s very distracting.

#3- What is the Best Plagiarism Checker Tool That Can Also Rewrite Content?

The best plagiarism checker tool that can also rewrite content is Quillbot. Besides being a plagiarism checker Quillbot is also an excellent content paraphraser and summarizer.

Content summarizing is truly free and there is no paid plan while paraphrasing content is also free but a paid plan is available to unlock additional paraphrasing modes.

You can read my Quillbot AI review to learn more about it.

#4- Can Plagiarism Checking Tools Detect AI Content?

Tools like Jasper AI (review), Quillbot, Writesonic, ShortlyAI, and others boast about giving unique content that can’t be detected by any plagiarism software.

This means plagiarism checking tools can’t detect AI-generated content if the AI tool you used gave you 100% original content.

However, AI content itself can be detected. For example, Originality.ai is a tool built for AI content detection. You can read my Originality.ai review Originality.ai pricing and my Originality.ai coupon code guides to learn more about it

And there are also other tools that claim to be able to detect GPT type of AI content.

Check out my guide to the best AI content detection tools to learn more about them.

#5- Can Making Deliberate Grammar Errors Beat Plagiarism Checking Tools?

Making deliberate grammar errors can’t beat plagiarism-checking tools. These tools are sophisticated and can deduce what the wrongly spelled word was supposed to be and they can still use when checking for content duplication.

I don’t suggest you submit any content that’s riddled with typos and spelling errors. To make sure you don’t check out my guide to the best grammar checkers now!

#6- Can Plagiarism Checker Tools be Beaten by Online Paraphrasing Tools?

Online plagiarism checker tools can be beaten by online paraphrasing tools.

But it’s not that simple.

If you use a simple content spinner to switch this word for that word, this synonym for that synonym, don’t be surprised if your content gets flagged as duplicated.

But if you use a pro paraphraser which can change both the words and sentences while preserving meaning, then you’re in the clear.

If you’re interested in paraphrasing software that can do that for you check out my guide to the best online paraphrasing tools next.

Best Plagiarism Checker Tools and Apps for 2023 FAQ- All Your Questions Answered! Click To Tweet

Best Plagiarism Checker Tools and Apps for 2023 (Conclusion)

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These were the best plagiarism checking tools. apps and software in 2023.

MOst of them are premium and paid, but Duplichecker is free and excellent.

Which one will you pick?

LMK in the comment section below!