Harper vs Sentence Checker
| Harper | Sentence Checker | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | Free | Free |
| Open source | No | No |
| Platforms | Web, Windows, macOS, Linux | Web |
| Free plan | Yes | Yes |
| Browser extension | Yes | Yes |
| Desktop app | Yes | — |
| Style suggestions | Yes | Yes |
| Languages supported | 1 | — |
| Tone detection | — | Yes |
Both are listed in Best Grammar Checkers. On Inferse, Harper scores higher on our published basis.