GMX Mail vs Proton Mail
| GMX Mail | Proton Mail | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | Free |
| Open source | No | No |
| Platforms | Web, iOS, Android | Web, Windows, macOS, Linux, iOS, Android |
| Free plan | Yes | Yes |
| Email aliases | Yes | Yes |
| Ad-free inbox | No | Yes |
| Platform access | web_and_mobile | — |
| Paid from | — | $12.99/mo |
| Mailbox storage | — | 15 GB |
| Attachment limit | — | 25 MB |
| Custom domain | — | Yes |
Both are listed in Best Personal Email Services. On Freedom251, Proton Mail scores higher on our published basis.