Tuta can be used without paying: Free plan with 1 GB; paid plans for more storage and domains. Check the vendor’s pricing page for current limits.

Yes. Tuta publishes its source code under the GPL-3.0 license.

Which platforms does Tuta support?

Tuta is available on: Web, iOS, Android, Windows, macOS, Linux.

What is Tuta best for?

Encrypted email and calendar on a free plan. In our ranking of secure email providers it is number 2 of 6 with a score of 90.0.

What are the best alternatives to Tuta?

The highest-ranked alternatives on listme.name are Proton Mail, Mailfence, Posteo, Runbox.

Tuta Review, Pricing & Alternatives (2026)

90.0score

Ranked 2 of 6 in best secure email providers

End-to-end encrypted mail and calendar on a free plan with post-quantum encryption, open-source clients under GPLv3 and servers in Germany. The free plan has only 1 GB of storage.

Best for Encrypted email and calendar on a free plan

About Tuta

Tuta provides email, calendar and contacts, with end-to-end encryption that covers the address book and calendar as well as messages. Its apps are listed for web, Windows, macOS, Linux, Android and iOS, and the free plan includes 1 GB of storage. The service uses post-quantum cryptography, according to its site.

Paid plans add storage, custom domains and extra email addresses, and the top plan offers 500 GB. Tuta says all of its clients are open source and published under GPLv3, and its servers are in Germany. The company also states that it runs on renewable energy.

Key features

End-to-end encrypted email and calendar
Post-quantum encryption
Open-source clients under GPLv3
Servers based in Germany
Free plan with 1 GB

Strengths

Free plan with end-to-end encrypted mail and calendar
Clients published under GPLv3
Servers based in Germany

Limits

Free plan includes only 1 GB of storage
Custom domains need a paid plan

Where Tuta ranks

List	Rank	Score	Best for
Best Secure email providers	2 of 6	90.0	Encrypted email and calendar on a free plan

Alternatives to Tuta

All 5 alternatives

Compare Tuta

Questions about Tuta

Is Tuta free?: Tuta can be used without paying: Free plan with 1 GB; paid plans for more storage and domains. Check the vendor’s pricing page for current limits.
Is Tuta open source?: Yes. Tuta publishes its source code under the GPL-3.0 license.
Which platforms does Tuta support?: Tuta is available on: Web, iOS, Android, Windows, macOS, Linux.
What is Tuta best for?: Encrypted email and calendar on a free plan. In our ranking of secure email providers it is number 2 of 6 with a score of 90.0.
What are the best alternatives to Tuta?: The highest-ranked alternatives on listme.name are Proton Mail, Mailfence, Posteo, Runbox.