Aster Mail vs Tuta Mail
Aster Mail
astermail.org
Tuta Mail
tuta.comSide by side
| Figure | Aster Mail | Tuta Mail |
|---|---|---|
| Price from | $2.42/mo | €3/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| Plans published | 4 | 3 |
| Spec score · Private Email Services | 9.5 (#1) | 8.7 (#8) |
| Spec score · Secure Email Providers | 9.5 (#1) | 8.6 (#12) |
| Spec score · Email providers | 9.4 (#2) | 9.5 (#1) |
| Custom domain | Yes | Yes |
| Email aliases | 15 | 15 |
| Encrypted calendar | No | Yes |
| End-to-end encryption | Yes | Tuta encrypts mailbox data end to end and says it has zero access to the mailbox. |
| Founded | 2026 | 2011 |
| Free plan | Yes | Yes |
| Headquarters | Orlando, Florida, United States | Hanover, Germany |
| Mailbox storage | 50 | 20 |
| Mail protocol support | bridge | none |
| Supported platforms | Aster supports web, desktop, Android, and an iOS beta on TestFlight. | Apps are available for Android, iOS, Windows, macOS, and Linux, plus browser access. |
Plans
In their own words
Aster Mail
Aster Mail is an open-source email service with a free plan and paid tiers. It supports web, desktop, and Android, with an iOS beta on TestFlight; native desktop apps are available for Windows, Mac, and Linux. Aster Bridge lets desktop mail apps connect over IMAP and SMTP. Mail between Aster accounts is automatically end-to-end encrypted and uses hybrid post-quantum encryption. The free plan costs nothing and includes 10 GB of encrypted storage, five aliases, one custom domain, two mail rules, attachments up to 25 MB per message, and Bridge access; no trial or credit card is required. Aster says its email is hosted in Germany under EU privacy law and that it does not use ads, inbox scanning, or AI on the inbox. QuickSwitch imports mail from Gmail, Outlook, Yahoo, Proton, and other IMAP providers. MBOX mailbox export is free on every plan. Paid plans start at $2.42 a month, billed annually, with the final amount determined at checkout. Aster Mail was founded in 2026 and is headquartered in Orlando, Florida, United States.
Tuta Mail
Tuta Mail is an encrypted email service with apps for Android, iOS, Windows, macOS, and Linux, plus browser access. It includes an encrypted calendar and supports offline use; full offline support is listed among paid-plan benefits. The free plan provides 1 GB of storage, one calendar, and three labels. Revolutionary costs €3 a month billed annually and includes 20 GB, 15 extra email addresses, and three custom domains. Legend costs €8 a month billed annually and includes 500 GB, 30 extra email addresses, and 10 custom domains. Paid plans support calendar sharing and event invitations; desktop clients can import EML or MBOX files. Tuta says its clients are open source and auditable, and its data is stored on its servers in Germany in ISO 27001 certified data centers. The service uses post-quantum cryptography, and mail protocol support is listed as none. Family multi-user support can be activated through support on paid plans. Priority email support replies within one business day on Legend.