Private.Ki Mail vs Proton Mail
| Private.Ki Mail | Proton Mail | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | $5/mo | Free |
| Open source | No | No |
| Platforms | Web | Web, Windows, macOS, Linux, iOS, Android |
| Free plan | Yes | Yes |
| End-to-end encryption | Yes | Yes |
| Custom domain | — | Yes |
| Mailbox storage | — | 15 GB |
| Email aliases | — | 10 aliases |
| Encrypted calendar | — | Yes |
| Mail protocol support | — | bridge |
Both are listed in Best Secure Email Providers, Best Email Providers. On Freedom251, Proton Mail scores higher on our published basis.