KMail vs Mailspring
| KMail | Mailspring | |
|---|---|---|
| Free plan | Yes | |
| Free trial | Yes | |
| Platforms | Linux | Linux, macOS, Windows |
| Free plan | Yes | Yes |
| App coverage | desktop | desktop |
| Unified inbox | Yes | Yes |
| Offline access | Yes | Yes |
| Scheduled sending | Yes | Yes |
| Calendar tools | Yes | No |
Listed together in Best Email Clients