Best Red Paper Alternatives in 2026
Updated
20 apps from plagiarism checkers ranked against Red Paper on the same published basis.
- 1Red Paper vs Noplag
- 2Red Paper vs Originality.ai
- 3Red Paper vs PlagAware
- 4Red Paper vs Plagiarisma
- 5Red Paper vs Quetext AI Detector
- 6Red Paper vs SmallSEOTools Plagiarism Checker
- 7Red Paper vs PrePostSEO Plagiarism Checker
- 8Red Paper vs Smodin Plagiarism Checker
- 9Red Paper vs Copyleaks AI Detector
- 10Red Paper vs DupliChecker
- 11Red Paper vs PlagiarismCheck.org
- 12Red Paper vs PlagiarismSearch
- 13Red Paper vs Viper
- 14Red Paper vs Dolos
- 15Red Paper vs MOSS
- 16Red Paper vs Plag
- 17Red Paper vs Plagiarism Checker X
- 18Red Paper vs Plagiarism Detector
- 19Red Paper vs Plagius
- 20Red Paper vs Plagramme
Red Paper alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Noplag | 6.7 | Free plan | $9.99/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 2 | Originality.ai | 6.4 | Free plan | $12.95/mo | API, Browser, Web |
| 3 | PlagAware | 6.4 | Free plan | €2.99/mo | API, Web |
| 4 | Plagiarisma | 6.4 | Free plan | Free | Web, Windows |
| 5 | Quetext AI Detector | 6.4 | Free plan | $7.99/mo | API, Browser, Web |
| 6 | SmallSEOTools Plagiarism Checker | 6.4 | Free plan | $7.84/mo | API, Browser, Web |
| 7 | PrePostSEO Plagiarism Checker | 5.8 | No | $0.35/mo | Android, API, iOS, Mac, Web, Windows |
| 8 | Smodin Plagiarism Checker | 5.6 | No | $10/mo | Android, API, Browser, iOS, Web |
| 9 | Copyleaks AI Detector | 5.5 | No | $1.17/mo | API, Browser, Web |
| 10 | DupliChecker | 5.4 | No | $9.99/mo | API, Web |
| 11 | PlagiarismCheck.org | 5.4 | No | — | API, Browser, Web |
| 12 | PlagiarismSearch | 5.4 | No | $27.95/mo | API, Browser, Web |
| 13 | Viper | 5.4 | No | — | Web |
| 14 | Dolos | 5.3 | Free plan | Free | API, Linux, self-hosted, Web, Windows |
| 15 | MOSS | 5.3 | No | — | Web, Linux |
| 16 | Plag | 5.2 | No | — | Web |
| 17 | Plagiarism Checker X | 5.2 | No | — | Windows |
| 18 | Plagiarism Detector | 5.2 | No | — | Web, Windows |
| 19 | Plagius | 5.2 | No | $4.90/mo | Mac, Web, Windows |
| 20 | Plagramme | 5.2 | No | — | Web |
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Questions about Red Paper alternatives
What is the best alternative to Red Paper?
Noplag, number 1 in plagiarism checkers with a score of 6.7 out of 10. The others here: Originality.ai, PlagAware, Plagiarisma and 16 more.
What is the best free alternative to Red Paper?
Noplag is the best-ranked alternative with a free plan. 7 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.