In the SEO world, you will often need to check content for plagiarism.
Either it’s a content you ordered from freelancers or someone is pitching you a guest post.
Non-original scraped content just won’t rank in Google.
Moreover, if you have a lot of stolen content, it’s a definite “low quality” sign for the whole site, so forget about any Google traffic. What even worse, your site can get penalised.
I collected top plagiarism checker tools and experimented with the same piece of content from my site.
Let’s see the results of each tool.
I’ve inserted nicely paraphrased piece of ~650 words, with one clearly stolen element.
Also, during check, I didn’t exclude my original source.
Often Copyscape is an industry standard.
It found 6 sources, 2 of which are my original articles.
From remaining four, 3 are Pinterest sites and one blog.
For the same content piece, I’ve got 100% unique content in SmallSEOtools Plagiarism Checker.
And even part, which is clearly non-original, was shown as unique.
Quetext only shows two original sources from my site, similar to Copyscape.
No plagiarism detected, 100% original content. 😅
It identified 47.9% text uniqueness, with 8 sources of content (which is quite close to reality).
So, far it’s the best result.
100% original content
0% original content (because of one source from my site) and 17 sources.
But, the free check was only limited to 200 words.
82% non-original content. From 3 sources: my site and two Quora answers.
100% unique content.
53.3% non-original content, from 9 sources.
Maybe, this is not the best reliable tool, from a .ru domain, but it showed an incredibly detailed result.
It found 10 sources for a non-original piece of content.
Sometimes, this tool is over-detailed and shows some content, which is, in fact, original, but just has some similar structure.
If you are a plagiarism junkie, this is your tool.
Plagiarism checker tools review
Therefore, according to this very simple and non-ideal research, Unicheck provided the most detailed and closest to reality plagiarism check.
Edubirdie, PapersOwl, Content-watch – also demonstrated quite good results.
More well-known tools, such as Copyscape, SmallSEOtools – were not that precise.
Best paid plagiarism checker tool: Unicheck
Best free plagiarism check software: EduBirdie
If I missed some great plagiarism tool or Chrome extension, hint a suggestion in comments.