Comparison of plagiarism checker tools

In seeking to find the best plagiarism checker tool on the market in 2022, we conducted an experiment comparing the performances of 10 checkers. We also carried out a separate experiment comparing 11 free plagiarism checkers. There was some overlap between the two experiments in terms of the tools covered.

We focused on a series of factors in our analysis. For each tool, we analyzed the amount of plagiarism it was able to detect, the quality of matches, and its usability and trustworthiness.

This article describes our research process, explaining how we arrived at our findings.

We discuss:

  • Which plagiarism checkers we selected
  • How we prepared test documents
  • How we analyzed quantitative results
  • How we selected criteria for qualitative analysis
To skip to the results and in-depth comparison, check out our article reviewing the best plagiarism checkers of 2022, and our free plagiarism checker comparison.

Continue reading: Comparison of plagiarism checker tools

Best Plagiarism Checkers of 2022 Compared

The best plagiarism checker should be able to detect plagiarism the most accurately, even if the original phrasing has been altered. The tool should also provide a clear, comprehensive plagiarism report.

To identify which plagiarism checker is best, we conducted in-depth research comparing the performance of 10 checkers. We uploaded plagiarized texts that were either directly copied and pasted or edited to varying degrees. In total, we used 180 sources to construct our test documents.

Conclusion
Our in-depth research shows that the Scribbr Plagiarism Checker for students is the best plagiarism checker on the market in 2022. It is able to detect plagiarism in both exact copies and in heavily edited plagiarized texts, and provides a clear report.

Overview of total scores per plagiarism checker, based on the amount of detected plagiarism:

Plagiarism checker Overall score
1. Scribbr (in partnership with Turnitin) 4.7
2. Quetext 3.3
3. Grammarly 3.2
4. Unicheck 3.0
5. PlagScan 2.8
6. Pre Post SEO 2.2
7. Plagiarism Detector 2.2
8. Viper 2.0
9. Compilatio 1.8
10. Pro Writing Aid 1.8

Continue reading: Best Plagiarism Checkers of 2022 Compared