Noplag vs Viper
| Noplag | Viper | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | Yes | No |
| Paid from | $9.99/mo | — |
| Open source | No | No |
| Platforms | api, Linux, macOS, self-hosted, Web, Windows | Web |
| Free plan | Yes | No |
| Paid from | 9.99 /mo | — |
| Web source matching | Yes | — |
| Academic source matching | Yes | — |
| Supported languages | 5 languages | — |
| Word limit | 2,500 words | — |
| Report export formats | — | |
| API access | Yes | Yes |
| LMS integration | Yes | — |
Both are listed in Best Plagiarism Checkers, Best AI Plagiarism Checkers. On Samsung Mobile US Press, Noplag scores higher on our published basis.