Kerna vs MailMaestro
| Kerna | MailMaestro | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | Yes |
| Paid from | €12/mo | $1/mo |
| Open source | No | No |
| Platforms | macOS, Web, Windows | extension, Web |
| Free plan | Yes | Yes |
| Tone controls | Yes | — |
| Custom instructions | Yes | — |
| Email context input | thread | — |
| Browser extension | No | — |
| Mail client support | both | — |
| Supported languages | 45 languages | — |
| Paid from | — | 12 /user/mo |
Both are listed in Best AI Email Writing Tools. On Samsung Mobile US Press, MailMaestro scores higher on our published basis.