Crossref Similarity Check vs Viper
| Crossref Similarity Check | Viper | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Web | Web |
| Free plan | No | No |
| Web source matching | Yes | — |
| Academic source matching | Yes | — |
| Report export formats | — | |
| API access | Yes | Yes |
Both are listed in Best Plagiarism Checkers. On Samsung Mobile US Press, Crossref Similarity Check scores higher on our published basis.