Kerna vs ReplyCalm
| Kerna | ReplyCalm | |
|---|---|---|
| Free plan | Yes | Yes |
| Paid from | €12/mo | $9/mo |
| Platforms | macOS, Web, Windows | Web |
| Free plan | Yes | Yes |
| Tone controls | Yes | Yes |
| Custom instructions | Yes | |
| Email context input | thread | prompt |
| Browser extension | No | |
| Mail client support | both | |
| Supported languages | 45 languages | 6 languages |
Listed together in Best AI Email Writing Tools