4SecureMail vs Shutbox
| 4SecureMail | Shutbox | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | Yes | |
| Paid from | $5/mo | $1.99/mo |
| Platforms | Android, iOS, Linux, macOS, Web, Windows | Android, api, Web |
| Free plan | No | Yes |
| Paid from | 8.24 /mo | 1.99 /mo |
| Encryption scope | transport_only | |
| Custom domains | Yes | Yes |
| Mailbox storage | 0.5 GB | 10 GB |
| Email aliases | 3 aliases | |
| IMAP support | Yes | |
| Private calendar | No | |
| End-to-end encryption | Yes | |
| Zero-access storage | No | |
| Email alias limit | 8 aliases |
Listed together in Best Private Email Services