Polymail vs SIEVER Mail
| Polymail | SIEVER Mail | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | $10/mo | — |
| Open source | No | No |
| Platforms | Web, Windows, macOS, iOS | Windows, macOS, Linux |
| Free plan | No | — |
| Paid from | $10/user/mo | — |
| App coverage | all | desktop |
| Account limit | 2 accounts | — |
| Unified inbox | Yes | Yes |
| Scheduled sending | Yes | — |
| Calendar tools | Yes | — |
Both are listed in Best Email Clients. On Samsung Mobile US Press, Polymail scores higher on our published basis.