Proton Mail vs Shutbox
| Proton Mail | Shutbox | |
|---|---|---|
| Free plan | Yes | Yes |
| Paid from | Free | $1.99/mo |
| Platforms | Web, Windows, macOS, Linux, iOS, Android | Android, api, Web |
| Free plan | Yes | Yes |
| Mailbox storage | 15 GB | 10 GB |
| Email aliases | 10 aliases | |
| Paid from | 3.99 /user/mo | 1.99 /mo |
| Storage per mailbox | 15 GB | |
| End-to-end encryption | Yes | Yes |
| Custom domain | Yes | |
| Encrypted calendar | Yes | |
| Mail protocol support | bridge | |
| Attachment limit | 25 MB | |
| Ad-free inbox | Yes | |
| Custom domains | Yes | |
| Zero-access storage | No | |
| Email alias limit | 8 aliases |
Listed together in Best Private Email Services