Dolos vs Viper
| Dolos | Viper | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | api, Linux, self-hosted, Web, Windows | Web |
| Free plan | Yes | No |
| Web source matching | No | — |
| Academic source matching | No | — |
| Report export formats | CSV | — |
| API access | Yes | Yes |
Both are listed in Best Plagiarism Checkers. On Freedom251, Dolos scores higher on our published basis.