Spark Mail vs Unibox
| Spark Mail | Unibox | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | Yes | No |
| Paid from | $8.25/mo | — |
| Open source | No | No |
| Platforms | Android, iOS, macOS, Windows | macOS, iOS |
| Free plan | Yes | — |
| Paid from | $8.25/user/mo | — |
| Unified inbox | Yes | Yes |
| Offline access | Yes | — |
| Scheduled sending | Yes | — |
| Calendar tools | Yes | — |
Both are listed in Best Email Clients. On Inferse, Spark Mail scores higher on our published basis.