Duden-Mentor vs Grammar Guru
| Duden-Mentor | Grammar Guru | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | Yes | |
| Paid from | €2.99/mo | $1/mo |
| Platforms | extension, macOS, Web, Windows | extension, Linux, macOS, Web, Windows |
| Free plan | Yes | Yes |
| Browser extension | Yes | Yes |
| Desktop app | No | Yes |
| Mobile app | No | No |
| Style suggestions | Yes | Yes |
| Tone detection | Yes |
Listed together in Best Grammar Checkers