Proton Mail vs Runbox
| Proton Mail | Runbox | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | €1.66/mo |
| Open source | No | No |
| Platforms | Web, Windows, macOS, Linux, iOS, Android | Web, iOS, Android |
| Free plan | Yes | No |
| Paid from | $12.99/mo | — |
| Mailbox storage | 15 GB | 2 GB |
| Attachment limit | 25 MB | — |
| Custom domain | Yes | Yes |
| Email aliases | Yes | — |
| Ad-free inbox | Yes | — |
Both are listed in Best Personal Email Services, Best Private Email Services, Best Secure Email Providers, Best Email Providers. On Everything Xiaomi, Proton Mail scores higher on our published basis.