AT&T Mail vs Proton Mail
| AT&T Mail | Proton Mail | |
|---|---|---|
| Free plan | Yes | Yes |
| Paid from | Free | |
| Platforms | Android, iOS, Web | Web, Windows, macOS, Linux, iOS, Android |
| Free plan | Yes | Yes |
| Paid from | $5/mo | $12.99/mo |
| Mailbox storage | 5,120 GB | 15 GB |
| Attachment limit | 25 MB | 25 MB |
| Email aliases | Yes | Yes |
| Ad-free inbox | No | Yes |
| Platform access | web_mobile_desktop | |
| Custom domain | Yes | |
| Storage per mailbox | 15 GB | |
| End-to-end encryption | Yes | |
| Encrypted calendar | Yes | |
| Mail protocol support | bridge |
Listed together in Best Personal Email Services