Aster Mail vs Posteo
| Aster Mail | Posteo | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | $2.42/mo | — |
| Open source | Yes | No |
| Platforms | Android, iOS, Linux, macOS, Web, Windows | Web, Windows, iOS, Android |
| Free plan | Yes | No |
| Mailbox storage | 50 GB | 2 GB |
| Email aliases | 15 aliases | 20 aliases |
Both are listed in Best Private Email Services, Best Secure Email Providers, Best Email Providers. On Specifiction, Aster Mail scores higher on our published basis.