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