Best Check-Plagiarism Alternatives in 2026
Updated
20 apps from AI plagiarism checkers ranked against Check-Plagiarism on the same published basis.
- 1Check-Plagiarism vs Noplag
- 2Check-Plagiarism vs Plagium
- 3Check-Plagiarism vs Copyscape
- 4Check-Plagiarism vs PlagAware
- 5Check-Plagiarism vs Plagiarism Checker X
- 6Check-Plagiarism vs Plagiarisma
- 7Check-Plagiarism vs Proofademic
- 8Check-Plagiarism vs SmallSEOTools Plagiarism Checker
- 9Check-Plagiarism vs PrePostSEO Plagiarism Checker
- 11Check-Plagiarism vs SearchEngineReports Plagiarism Checker
- 12Check-Plagiarism vs Compilatio AI Detector
- 13Check-Plagiarism vs Copyleaks AI Detector
- 14Check-Plagiarism vs DupliChecker
- 15Check-Plagiarism vs PlagiarismCheck.org
- 16Check-Plagiarism vs PlagiarismDetector.net
- 17Check-Plagiarism vs PlagiarismSearch
- 18Check-Plagiarism vs Scribbr Plagiarism Checker
- 19Check-Plagiarism vs Turnitin Originality
- 20Check-Plagiarism vs Turnitin Similarity
- 21Check-Plagiarism vs Viper
Check-Plagiarism alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Noplag | 6.6 | Free plan | $9.99/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 2 | Plagium | 6.5 | Free plan | Free | Android, iOS, Web |
| 3 | Copyscape | 6.4 | Free plan | $4.95/mo | API, self-hosted, Web |
| 4 | PlagAware | 6.4 | Free plan | €2.99/mo | API, Web |
| 5 | Plagiarism Checker X | 6.4 | Free plan | Free | Windows |
| 6 | Plagiarisma | 6.4 | Free plan | Free | Web, Windows |
| 7 | Proofademic | 6.4 | Free plan | $15/mo | API, Web |
| 8 | SmallSEOTools Plagiarism Checker | 6.4 | Free plan | $7.84/mo | API, Browser, Web |
| 9 | PrePostSEO Plagiarism Checker | 5.7 | No | $0.35/mo | Android, API, iOS, Mac, Web, Windows |
| 11 | SearchEngineReports Plagiarism Checker | 5.5 | No | $1,012/mo | Web |
| 12 | Compilatio AI Detector | 5.4 | No | — | API, Web |
| 13 | Copyleaks AI Detector | 5.4 | No | $1.17/mo | API, Browser, Web |
| 14 | DupliChecker | 5.4 | No | $9.99/mo | API, Web |
| 15 | PlagiarismCheck.org | 5.4 | No | — | API, Browser, Web |
| 16 | PlagiarismDetector.net | 5.4 | No | $9.99/mo | API, Browser, Web |
| 17 | PlagiarismSearch | 5.4 | No | $27.95/mo | API, Browser, Web |
| 18 | Scribbr Plagiarism Checker | 5.4 | No | — | Web |
| 19 | Turnitin Originality | 5.4 | No | — | Web |
| 20 | Turnitin Similarity | 5.4 | No | — | API, Web |
| 21 | Viper | 5.4 | No | — | Web |
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Questions about Check-Plagiarism alternatives
What is the best alternative to Check-Plagiarism?
Noplag, number 1 in AI plagiarism checkers with a score of 6.6 out of 10. The others here: Plagium, Copyscape, PlagAware and 16 more.
What is the best free alternative to Check-Plagiarism?
Noplag is the best-ranked alternative with a free plan. 8 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.