Overview

Tuta combines end-to-end encrypted email with an encrypted calendar. Its clients are open source and auditable, and it uses quantum-resistant cryptography. Data is stored in ISO 27001-certified data centers in Germany; Tuta is based in Hanover and was founded in 2011.

The main trade-off is that Tuta supports no mail protocols. That makes its own apps and browser access the route to the service, rather than a conventional mail client using a supported protocol. For privacy-focused users comfortable with that constraint, the combination of encryption and broad platform coverage is compelling.

Key features

Encrypted mail and calendar

End-to-end encryption is central to Tuta’s email service, and the calendar is encrypted too. Free users get one calendar; paid plans allow unlimited calendars. Paid users can share calendars and send event invitations, including invitations to external users encrypted with a shared password. These capabilities make the paid plans more suitable for coordinating across people, while the free calendar is better for a basic personal schedule.

Storage and account management

The free plan’s 1 GB is enough to try the service, but it leaves little room for a growing mailbox. Revolutionary raises storage to 20 GB, while Legend provides 500 GB. Desktop clients can import EML and MBOX files, which helps when moving existing messages. Paid plans support custom email domains; Revolutionary includes three custom domains and 15 extra email addresses, while Legend includes 10 domains and 30 extra addresses.

Security and access

All Tuta clients are fully open source, allowing security experts to audit them. The service also uses quantum-resistant cryptography. Apps are available for Android, iOS, Windows, macOS and Linux, alongside browser access. Offline use is supported, with full offline support presented as a paid-plan benefit.

Pricing

Tuta is freemium, with prices billed annually. The free plan is a lasting option rather than a time-limited trial.

Plan	Price	What it includes
Free	0.00 EUR per free	1 GB storage, one calendar, three labels and end-to-end encryption.
Revolutionary	3.00 EUR per month	20 GB storage, 15 extra email addresses, three custom domains, unlimited calendars and offline support.
Legend	8.00 EUR per month	500 GB storage, 30 extra email addresses, 10 custom domains, unlimited calendars and priority email support.

Free is for someone who wants to try encrypted email or keep a small mailbox; its 1 GB, single calendar and three labels are clear constraints. Revolutionary is the practical step up for an individual who needs a custom domain, more room and multiple calendars. Legend suits users who need much more storage, more domains and priority email support; its premium over Revolutionary is most persuasive when those higher limits matter.

Paid plans can add family multi-user support through support. Revolutionary family members cost €3 per user per month, and shared mailboxes cost €3 per month. On Legend, family members cost €8 per user per month and shared mailboxes cost €8 per month. Priority email support replies within one business day. The plan details do not define a seat quota, so family costs are per user rather than a stated bundle.

Platforms

Tuta offers apps for Android, iOS, Windows, macOS and Linux, plus browser access. That breadth makes it a viable choice for people moving between phones and computers. The lack of mail protocol support is the corresponding limitation: readers who require access through a separate protocol-compatible mail client should look elsewhere.

Who it's for

Tuta is a strong fit for individuals and families who prioritize encrypted email and calendars, want open-source clients, and are willing to use Tuta’s apps or browser. Revolutionary is the clearest fit for a personal custom-domain mailbox; Legend is better for large storage needs, several domains or priority support. The free plan is best treated as an entry point or a small-scale account, not a roomy mailbox.

It is a weaker fit for anyone who depends on mail protocols or needs more than 1 GB without paying. Businesses may find the domain and family options useful, though the stated family add-ons are not a substitute for a specified business seat plan.

Pros and cons

Pros

End-to-end encrypted email and an encrypted calendar: privacy protections extend beyond mail to scheduling.
Open-source clients and quantum-resistant cryptography: users get auditable apps and a forward-looking encryption approach.
Broad device coverage: apps span Android, iOS and all three major desktop operating systems, with browser access as well.
Useful paid storage and domain options: Revolutionary offers 20 GB and three custom domains; Legend scales to 500 GB and 10 domains.
Migration and sharing tools: desktop EML/MBOX import and paid calendar sharing support moving in and coordinating around the account.

Cons

No mail protocol support: users cannot rely on conventional protocol access through their preferred mail client.
The free plan is constrained: 1 GB and one calendar limit its usefulness as a primary account over time.
Several useful capabilities require a paid plan: custom domains, unlimited calendars, calendar sharing and full offline support sit beyond the free tier.
Family pricing is per user: multi-user support must be activated through support, and member and shared-mailbox charges add up separately.

Alternatives

Proton Mail is worth considering if its free plan’s 1 GB storage and one email address suit your needs; it also has apps across web, desktop and mobile platforms.

Aster Mail is an alternative for readers prioritizing a free, open-source service with 10 GB encrypted storage, five aliases and one custom domain.

eclipso Mail Europe offers a free plan with 4 GB storage, one address and no aliases, a different set of limits for a no-cost account.

Mailfence may suit readers who want web access and mobile apps, with its free plan splitting 1 GB between email and document storage.

Mailo is an option for readers who value IMAP4 and EAS access; its free tier includes 1 GB email storage and five aliases.

mail.de offers free plans with no contract period, including FreeMail Zero with 500 MB storage, a 25-email daily limit and 60 MB attachment size.

mailbox is a paid alternative if protocol access is important: its Light plan is 1.00 EUR per month billed annually and includes 2 GB storage, three aliases, calendar and address book, and IMAP and POP3 access.

SecureMyEmail is another freemium option, with its free plan covering one email address.

For broader comparisons, see Email providers, Secure Email Providers and Private Email Services.

Verdict

Choose Tuta Mail if encrypted mail and calendar, auditable clients and coverage across desktop and mobile matter more than protocol flexibility. Revolutionary is the sensible paid choice for a custom domain and room to grow; Legend earns its higher price for users who genuinely need 500 GB, more domains or priority support. Look elsewhere if you need a conventional mail protocol or expect the free plan to handle a large mailbox.

	Shutbox	Tuta Mail
Free plan	No	Yes
Free trial	No	No
Paid from	—	€3/mo
Open source	No	No
Platforms	Web	Android, iOS, Linux, macOS, Windows
Free plan	Yes	Yes
Paid from	1.99 /mo	—
Custom domains	Yes	—
Mailbox storage	—	20 GB
Email aliases	—	15 aliases

Shutbox vs Tuta Mail

Shutbox

Tuta Mail