Plagiarism Checker, Free Comparison: Essay Help

Free plagiarism sites are popular. Many students, marketers, and copywriters use them to avoid plagiarism. We conducted research to answer two main questions:

  1. Which plagiarism checkers are really free?
  2. How much plagiarism is detected by each plagiarism checker?
Plagiarism checkerPlagiarism detectedReally free?Restrictions
Scribbr44%Not freeBest plagiarism checker 2019
1. Quetext29%Only free trial3 x 500 words
2. EasyBib19%Only free trial3 days (credit card required)
3. PlagScan17%Only free trial2,000 words
4. Plagramme16%Not freeOnly shows percentage
5. Copyleaks7%100% free2,500 words p/m for free
6. Small SEO Tools5%100% freeMax. 1,000 words per check
7. Grammarly1%Not freeOnly shows percentage
8. Search Engine Reports4%100% freeMax. 1,000 words per check
9. PaperRater0%100% free10 checks per month
10. Edubirdie4%100% freeMight not be safe to use


Almost all 100% free plagiarism testers detect very little plagiarism. Plagiarism checkers that offer a free trial perform much better. However, you will probably end up paying for the service. For comparison, we have added Scribbr Plagiarism Checker, which is the best plagiarism checker since 2019. It’s not free, but it detects the most plagiarism of all plagiarism checkers.

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When to use a free plagiarism checker?

Many free plagiarism checkers do not detect all plagiarism in a document. This can be a problem in some cases, but sometimes the free version is good enough. It is best to use a free plagiarism checker if: you only check small pieces of text (maximum one page) You want to check this before purchasing the premium version No one else will check your text for plagiarism.

Disadvantages of free plagiarism checkers

Free plagiarism checks can be useful, but they often have serious drawbacks when compared to paid plagiarism checks. Lots of free plagiarism checks:

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  • Do not detect all plagiarism
  • Have usage limits
  • Store, publish or even sell your work
  • Have a lot of advertisements
  • Have no customer support
  • Reserve certain features for the paid version

Free plagiarism checker reviews


Scribbr plagiarism checker


  • Detects more plagiarism than any other plagiarism checker
  • You can manually delete your document after checking for plagiarism
  • Lists all matched sources
  • Largest plagiarism database


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Scribbr’s Plagiarism Checker is specially designed for students. Reviewing your article, paper, or essay has never been easier, safer, or more accurate. The technology used is as advanced (if not more) than the software used in most universities. Besides showing the percentage of plagiarism, the plagiarism report includes a list of all sources similar to your document. This makes it very easy to add a missing quote. In addition to checking for plagiarism, Scribbr has an extensive knowledge base to help you understand plagiarism so you can avoid it in the future.

1. Quetext

quetext free plagiarism checker


  • Only 3 free checks (up to 500 words)
  • Only monthly subscription of $9.99 possible after free trial
  • Does not detect all plagiarism


  • Simple plagiarism report
  • Built-in citation feature
  • Documents are not stored in database


The Quetext Checker Plagiarism generated plagiarism report provides a good overview and is easy to understand. The similarities are underlined and the percentage of plagiarism is displayed. Quetext offers a free trial of three checks (up to 500 words) in the hopes that users will upgrade to the paid version for $ 9.99 per month after the trial ends. Overall, Quetext is a safe plagiarism checker. However, if you are willing to pay money to check for plagiarism, there are better alternatives such as Scribbr Plagiarism Checker.

2. EasyBib

EasyBib plagiarism checker logo


  • Document are added to the BibMe plagiarism database
  • Only a 3-day trial period
  • Credit card required to start the trial


  • Built-in citation tool
  • Combined with spelling check tool


EasyBib Plagiarism Checker is specially designed for students. You can upload the document or copy and paste the text to use the plagiarism checker. EasyBib detected 19% of plagiarism and was ranked second in this list of free plagiarism testers. Unfortunately, the free trial only lasts three days, after which it automatically converts to a paid subscription. EasyBib is quite easy to use and includes a built-in citation and spelling checker. If this is what you are looking for, then Easybib Plagiarism Checker might be something for you. Remember that all documents you upload are added to the BibMe database by plagiarism.

3. PlagScan

PlagScan plagiarism checker logo


  • Only the first 2,000 words are free


  • Easy to use
  • No credit card required for the free trial
  • Can be purchased separately


PlagScan rounds out the top three free plagiarism checks. It found 17% plagiarism in our test document. From start to finish, PlagScan plagiarism checker is easy to use. You can upload files from your computer, copy and paste text, or upload files via Dropbox or Google Drive. The plagiarism report is easy to understand. It shows you the percentage, source list and overview of your document that highlights the plagiarized text. Unfortunately, only the first 2000 words are free. PlagScan hopes that those who love the tool will eventually pay for it. For $ 10, you can check another 20,000 words.

4. Plagramme

Plagramme plagiarism checker


  • Only the plagiarism percentage is shown, not which sections contain plagiarism
  • Account needed to use free trial
  • Text doesn’t maintain the original formatting


  • Affordable paid version


With a reported plagiarism rate of 16%, Plagramm came in fourth in this comparison. The technology is slightly worse than that of PlagScan and EasyBib. Plagiarism reporting can be tricky, and sometimes it will mistakenly flag commonly used phrases as plagiarism. Although Plagramme is on this list of free plagiarism checkers, it cannot be used for free. The free version scans your document and gives you only the plagiarism percentage. It does not show which paragraphs are plagiarized. To unblock this information, you need to pay about $ 0.35 per page.

5. Copyleaks

Copyleaks plagiarism checker logo


  • Only 2,500 words per month for free
  • Documents are added to the Copyleaks database


  • Easy-to-understand plagiarism report


The copyleaks detected only 7% of plagiarism, while other free plagiarism checkers like Quetext found 29%. This is because Copyleaks cannot detect plagiarism if a sentence is restructured or when a word in a sentence is replaced. Every month you can check 2500 words for free. If you need more, you can opt for a subscription (from $ 11 per month) or a prepaid option. For an additional 25,000 words, you will need to pay between $ 10 and $ 13. The Plagiarism Report is easy to understand and shows all sources that contain text that is similar to yours. The report displays the percentage of plagiarism checks and highlights plagiarism.

6. Small SEO Tools

Small SEO Tools review


  • Lot of plagiarism stays undetected
  • Word limit of 1,000 words


  • No usage limit
  • Different views in the plagiarism report


The Plagiarism Checker offered by Small SEO Tools is designed for marketers. This can be useful for checking small pieces of text for plagiarism, especially if you may have copied exact sentences from other sources. However, Small SEO Tools does not detect plagiarized offers that are slightly modified. A lot of plagiarism goes unnoticed because of this, as you can see from our test document: only 5% of plagiarism was detected.

The plagiarism report has three different views: the “document view,” which highlights all the plagiarized text; the “matched sources view,” which connects the plagiarized sentences to the original source; and the “sentence wise result,” which analyses each sentence separately.

Overall, it’s an easy-to-use plagiarism checker. It works well for small snippets of text, but it’s not suitable for papers and other large documents.

7. Grammarly

Grammarly plagiarism checker review


  • A lot of plagiarism stays undetected
  • The free version shows only whether a text contains plagiarism, not a plagiarism percentage or which sentences are plagiarized
  • Expensive monthly plans for the paid version


  • Sleek design and easy to use
  • Integrated into the spelling and grammar checker


Surprisingly, Grammarly only found 1% of plagiarism in our test document. Also, the free version of Grammarly for plagiarism checker has very few options for detecting and fixing plagiarism. If you receive a notification that your document contains plagiarism, you probably want to know which sentences to check. To find out, you need to commit to paying for the version, which costs about $ 12 a month with an annual plan, or $ 29.95 with a monthly plan.

Is it worth paying for it? If you already pay for Grammarly, then this tool can definitely help you avoid plagiarism. If you don’t, then there are better and cheaper alternatives, such as the Scribbr Plagiarism Checker.

8. Search Engine Reports

Search engine reports free plagiarism checker


  • Lots of distracting ads
  • Every sentence is checked separately using Google’s exact match
  • Plagiarized text is not highlighted; you only get a complex list of sources
  • Original sources are not shown or linked; instead, you’re redirected to Google Search


  • No usage limit
  • They claim to delete all content uploaded to the site


The search engine plagiarism checker only detected 4% of plagiarism in our test document. The main reason for this is that the search engine reports use an exact Google search, which means that every single offer is searched on Google to see if a matching source has been found. If you only want to check a few sentences for plagiarism, then this plagiarism checker can help you. However, if you want to check multiple pages, this is useless as the plagiarism report leaves more questions than you started. Plagiarized text is not highlighted and the report cannot tell you what the original source is. He can only tell you that Google found a similar offer on another web page.

9. PaperRater

PaperRater review


  • Did not detect any plagiarism
  • A lot of distracting ads and fake buttons
  • Only 10 plagiarism checks per month for free


  • Strong privacy policy: your document stays yours
  • Does not check every sentence separately


While most free plagiarism checkers use Google’s “exact search” to check each sentence separately, PaperRater can look at entire paragraphs and conveniently link to relevant sources. This makes it very easy to correctly quote sections that you accidentally forgot to quote. However, PaperRater was unable to detect plagiarism in our test document. Therefore, we do not recommend this plagiarism checker.

10. Edubirdie

Edubirdie free plagiarism checker


  • Possibly sells your document via their essay-writing service
  • Lots of plagiarism stays undetected
  • Common words are falsely flagged as plagiarism


  • No usage limit


Edubirdie only found 4% of plagiarism in our word document, while other free checks found up to 29%. This shows that there are better alternatives to this service. In addition, we do not recommend using the Edubirdie plagiarism checker as its relationship to the essay writing service is unclear. The terms of use, which each user must accept, clearly state that you are granting Edubirdie a free license for your work. In other words, they can sell the text you upload. This is the last thing you want, especially if you are a student checking your essay for plagiarism.

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