Best Plagiarism Checkers in 2026
Updated
When you need to check writing for copied material, compare plagiarism checkers by the sources they can match and the limits they place on a submission. Academic and web source matching, supported languages, and word limits help clarify what each tool can review. Noplag, PlagAware, and Quetext AI Detector are among the named options to consider. For a classroom or publishing workflow, check LMS integration, API access, and available report export formats. Free-plan availability and the published paid-from price can also help you weigh access. The right comparison depends on the kind of writing you review and which sources and reporting features matter to you.
31ranked
12free plans on this page
$0.35/molowest paid tier
11 Oct 2026last checked
Plagiarism Checkers, ranked on how quickly a newcomer can get going.18 of 18 products with recorded free access can be tried for free.
- 1 NoplagPaid from $9.99/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 2 PlagAwarePaid from €2.99/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 3 Plagiarism DetectorFree plan
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 4 CopyscapePaid from $4.95/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 5 Compilatio AI Detector
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 6 Quetext AI DetectorPaid from $7.99/mo
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 7 SmallSEOTools Plagiarism CheckerPaid from $7.84/mo
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 8 Copyleaks AI DetectorPaid from $1.17/mo
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 9 Crossref Similarity CheckPaid from $3.33/mo
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 10 Originality.aiPaid from $12.95/mo
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 11 Plagiarism Checker XFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 12 PlagiarismSearchPaid from $27.95/mo
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 13 PlagiusPaid from $4.90/mo
- Free to practise on: no
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 14 DolosFree plan
- Free to practise on: yes
- Free trial: no
- Well documented: yes
- Runs where you work: yes
- 15 PlagiarismaFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 16 PrePostSEO Plagiarism CheckerPaid from $0.35/mo
- Well documented: yes
- Runs where you work: yes
- 17 MOSSFree plan
- Free to practise on: yes
- Free trial: no
- Well documented: yes
- Runs where you work: no
- 18 JPlagFree plan
- Free to practise on: yes
- Free trial: no
- Well documented: yes
- Runs where you work: no
- 19 StrikePlagiarism
- Free to practise on: no
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 20 Smodin Plagiarism CheckerPaid from $10/mo
- Well documented: yes
- Runs where you work: yes
- 21 DrillBit
- Free to practise on: no
- Well documented: yes
- Runs where you work: yes
- 22 PlagPaid from €14.95/mo
- Well documented: yes
- Runs where you work: no
- 23 PlagiarismCheck.org
- Well documented: yes
- Runs where you work: no
- 24 PlagrammePaid from $14.95/mo
- Well documented: yes
- Runs where you work: no
- 25 DupliCheckerPaid from $9.99/mo
- Well documented: yes
- Runs where you work: no
Compare all 25 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Web source matching | Academic source matching |
|---|---|---|---|---|---|---|---|---|
| 1 | Noplag | 8.0 | Free plan | $9.99/mo | Yes | 9.99 /mo | Yes | Yes |
| 2 | PlagAware | 7.7 | Free plan | €2.99/mo | Yes | Yes | Yes | |
| 3 | Plagiarism Detector | 7.7 | Free plan | Free | Yes | Yes | Yes | |
| 4 | Copyscape | 7.6 | Free plan | $4.95/mo | Yes | Yes | ||
| 5 | Compilatio AI Detector | 7.1 | No | Yes | Yes | |||
| 6 | Quetext AI Detector | 7.1 | Free plan | $7.99/mo | Yes | 7.99 /mo | Yes | Yes |
| 7 | SmallSEOTools Plagiarism Checker | 7.1 | Free plan | $7.84/mo | Yes | 9.8 /mo | Yes | Yes |
| 8 | Copyleaks AI Detector | 7.0 | $1.17/mo | |||||
| 9 | Crossref Similarity Check | 7.0 | $3.33/mo | No | Yes | Yes | ||
| 10 | Originality.ai | 7.0 | Free plan | $12.95/mo | Yes | 12.95 /mo | ||
| 11 | Plagiarism Checker X | 7.0 | Free plan | Free | Yes | Yes | Yes | |
| 12 | PlagiarismSearch | 7.0 | $27.95/mo | Yes | Yes | Yes | ||
| 13 | Plagius | 7.0 | No | $4.90/mo | No | |||
| 14 | Dolos | 6.9 | Free plan | Free | Yes | No | No | |
| 15 | Plagiarisma | 6.9 | Free plan | Free | Yes | |||
| 16 | PrePostSEO Plagiarism Checker | 6.9 | $0.35/mo | Yes | 5.25 /mo | Yes | ||
| 17 | MOSS | 6.8 | Free plan | Free | Yes | No | No | |
| 18 | JPlag | 6.7 | Free plan | Free | No | No | ||
| 19 | StrikePlagiarism | 6.7 | No | No | Yes | Yes | ||
| 20 | Smodin Plagiarism Checker | 6.6 | $10/mo | Yes | 10 /mo | Yes | Yes | |
| 21 | DrillBit | 6.4 | No | No | Yes | Yes | ||
| 22 | Plag | 6.4 | €14.95/mo | Yes | Yes | Yes | ||
| 23 | PlagiarismCheck.org | 6.4 | Yes | Yes | Yes | |||
| 24 | Plagramme | 6.4 | $14.95/mo | Yes | 14.95 /mo | Yes | Yes | |
| 25 | DupliChecker | 6.3 | $9.99/mo | Yes | Yes | Yes |
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