Best Plagiarism Detector Alternatives in 2026
Updated
20 platforms from plagiarism checkers ranked against Plagiarism Detector on the same published basis.
- 1Plagiarism Detector vs Noplag
- 2Plagiarism Detector vs PlagAware
- 3Plagiarism Detector vs Copyscape
- 4Plagiarism Detector vs Originality.ai
- 5Plagiarism Detector vs Quetext AI Detector
- 6Plagiarism Detector vs SmallSEOTools Plagiarism Checker
- 7Plagiarism Detector vs Dolos
- 8Plagiarism Detector vs Copyleaks AI Detector
- 9Plagiarism Detector vs PlagiarismCheck.org
- 10Plagiarism Detector vs PlagiarismSearch
- 11Plagiarism Detector vs PrePostSEO Plagiarism Checker
- 12Plagiarism Detector vs DupliChecker
- 13Plagiarism Detector vs Smodin Plagiarism Checker
- 14Plagiarism Detector vs Plagiarism Checker X
- 15Plagiarism Detector vs Plagiarisma
- 16Plagiarism Detector vs Scribbr Plagiarism Checker
- 17Plagiarism Detector vs Viper
- 18Plagiarism Detector vs Plagius
- 19Plagiarism Detector vs Plagramme
- 20Plagiarism Detector vs Red Paper
Plagiarism Detector alternatives compared
| # | Platform | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Noplag | 7.4 | Free plan | $9.99/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 2 | PlagAware | 7.4 | Free plan | €2.99/mo | API, Web |
| 3 | Copyscape | 7.3 | Free plan | $4.95/mo | API, self-hosted, Web |
| 4 | Originality.ai | 7.3 | Free plan | $12.95/mo | API, Browser, Web |
| 5 | Quetext AI Detector | 7.3 | Free plan | $7.99/mo | API, Browser, Web |
| 6 | SmallSEOTools Plagiarism Checker | 7.3 | Free plan | $7.84/mo | API, Browser, Web |
| 7 | Dolos | 7.2 | Free plan | Free | API, Linux, self-hosted, Web, Windows |
| 8 | Copyleaks AI Detector | 7.0 | No | $1.17/mo | API, Browser, Web |
| 9 | PlagiarismCheck.org | 7.0 | No | — | API, Browser, Web |
| 10 | PlagiarismSearch | 7.0 | No | $27.95/mo | API, Browser, Web |
| 11 | PrePostSEO Plagiarism Checker | 7.0 | No | $0.35/mo | Android, API, iOS, Mac, Web, Windows |
| 12 | DupliChecker | 6.9 | No | $9.99/mo | API, Web |
| 13 | Smodin Plagiarism Checker | 6.9 | No | $10/mo | Android, API, Browser, iOS, Web |
| 14 | Plagiarism Checker X | 5.9 | Free plan | Free | Windows |
| 15 | Plagiarisma | 5.8 | Free plan | Free | Web, Windows |
| 16 | Scribbr Plagiarism Checker | 5.5 | No | — | Web |
| 17 | Viper | 5.5 | No | — | Web |
| 18 | Plagius | 5.4 | No | $4.90/mo | Mac, Web, Windows |
| 19 | Plagramme | 5.2 | No | $14.95/mo | Web |
| 20 | Red Paper | 5.2 | No | — | Web |
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Questions about Plagiarism Detector alternatives
What is the best alternative to Plagiarism Detector?
Noplag, number 1 in plagiarism checkers with a score of 7.4 out of 10. The others here: PlagAware, Copyscape, Originality.ai and 16 more.
What is the best free alternative to Plagiarism Detector?
Noplag is the best-ranked alternative with a free plan. 9 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it.