Tuta — An end-to-end encrypted email, calendar, and contacts service with open-source clients, positioned as an alternative to Gmail for privacy-conscious users.
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Best for: privacy-conscious individuals and organizations who want end-to-end encrypted email and calendar with open-source, auditable clients
Pricing: Free tier (1GB); Revolutionary from about €3/month (~$3.25); Legend from about €8/month (~$8.65); billed annually at a discount.
- Tuta's free tier includes 1GB storage, 1 calendar, and 3 labels with no custom domain.
- Tuta bills natively in EUR: Revolutionary is about €3/month and Legend about €8/month, both discounted when billed annually.
- Tuta's client apps are open source under GPL-3.0, distributed via GitHub, F-Droid, and mainstream app stores.
- Tuta uses TutaCrypt, a post-quantum end-to-end encryption scheme, applied to both email and calendar by default.
- Tuta does not support IMAP or SMTP, so its mailboxes only work through Tuta's own apps and webmail, not third-party clients.
Limitations: No PGP or S-MIME support for encrypting mail to non-Tuta recipients.; No IMAP/SMTP access for third-party email clients.; Free tier capped at 1GB storage with no custom domain.
Top alternatives: Proton Mail, Fastmail, Mailbox.org, Posteo — full list
What is Tuta?
Tuta (formerly Tutanota) is an end-to-end encrypted email, calendar, and contacts service built by the German company Tutao, marketed as a privacy-first alternative to Gmail and other mainstream webmail providers. Every message and calendar entry is encrypted using TutaCrypt, a post-quantum cryptography scheme Tuta designed to resist both current and future decryption attacks, including from quantum computers. Encryption covers the calendar as well as email, a feature most encrypted-email competitors don't extend beyond the inbox. All client applications are open source under the GPL-3.0 license and available for independent audit on GitHub, with distribution through the Apple App Store, Google Play, F-Droid, and direct APK downloads. Tuta's free plan includes 1GB of storage, one calendar, and three labels with no custom domain. The paid Revolutionary and Legend plans add unlimited calendars and labels, custom domains, and up to 500GB of storage, priced in EUR (roughly €3 and €8 per month respectively, discounted when billed annually). One notable limitation: Tuta does not support IMAP or SMTP, so its mailboxes work only through Tuta's own web, desktop, and mobile apps rather than third-party clients like Outlook or Thunderbird.
Tuta is a privacy-focused, end-to-end encrypted email and calendar service from the German company Tutao, positioned as an alternative to Gmail for individuals, journalists, healthcare providers, and organizations handling sensitive communication. It uses TutaCrypt, a post-quantum encryption scheme, to encrypt both email content and calendar entries by default, and ships fully open-source client apps (GPL-3.0) for web, Windows, macOS, Linux, iOS, and Android. Tuta offers a free tier with 1GB of storage, one calendar, and three labels; paid Revolutionary and Legend plans add up to 500GB of storage, unlimited calendars, and custom domain support, starting at roughly €3/month (about $3.25) billed annually at a discount. Unlike some encrypted email competitors, Tuta does not support IMAP or SMTP, so mailboxes can only be accessed through Tuta's own apps and webmail.
Standout feature: Post-quantum end-to-end encryption (TutaCrypt) covering both email and calendar by default, with fully open-source client apps auditable on GitHub.
Biggest weakness: No PGP or S-MIME support for encrypted mail to external, non-Tuta recipients, and no IMAP/SMTP access, so mailboxes only work through Tuta's own apps and webmail.
Pros
- Post-quantum end-to-end encryption (TutaCrypt) applied to both email and calendar, not just message bodies.
- Fully open-source clients (GPL-3.0) available for independent security audit, plus F-Droid and direct APK downloads outside the Play Store.
- Revolutionary and Legend plans include unlimited calendars and labels, with custom domain support starting at the Revolutionary tier.
- Ad-free, with no tracking or behavioral advertising built into the business model.
Cons
- No PGP or S-MIME support for encrypted messages to non-Tuta recipients.
- No IMAP or SMTP access, so Tuta inboxes can only be used through Tuta's own apps and webmail, not third-party clients like Outlook or Thunderbird.
- Free tier is capped at 1GB storage with no custom domain or extra email aliases.
Tuta pricing
Free tier · paid from $3.25/mo
| Plan | Price | Notes |
|---|---|---|
| Free | Free | 1GB storage, 1 calendar, 3 labels, no custom domains or extra email addresses. |
| Revolutionary | $3.25/mo | Approximate USD equivalent of Tuta's native EUR price (about €3/month, discounted to roughly €2.40/month billed yearly). 20GB storage, unlimited calendars and labels, 15 extra email addresses, 3 custom domains, calendar sharing, autoresponder, email import. |
| Legend | $8.65/mo | Approximate USD equivalent of Tuta's native EUR price (about €8/month, discounted to roughly €6.40/month billed yearly). 500GB storage, unlimited calendars and labels, 30 extra email addresses, 10 custom domains, priority email support. |
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