| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| Plans published | 3 | 2 |
| Spec score · Personal Email Services | 8.8 (#12) | 7.9 (#79) |
| Email aliases | Yes | Yes |
| Attachment limit | 25 | 20 |
| Email service | AT&T Mail is a free email service for AT&T and supported legacy email accounts. | SAPO Mail is a Portuguese email service with the @sapo.pt domain, accessible worldwide. |
| Free plan | Yes | Yes |
| Mailbox storage | 5120 | 65 |
| Platform access | web_mobile_desktop | web_and_mobile |
| Storage | AT&T says the service includes 1TB of storage. | Base accounts include 8 GB of storage and Premium accounts include 65 GB. |
| Support | AT&T provides self-service setup, troubleshooting, security, password, and account recovery help, plus support videos. | SAPO advertises Portuguese-language customer support by phone at 16200, available 24 hours a day. |
