A German-based service launched in 2011, Tuta is open-source and offers a fully encrypted mailbox, calendar, and address book. Tuta uses their own (RSA + AES based) encryption method, to protect more than just the email body (including subject, attachments, calendar, contacts, notifications).

Icon for Tuta

Key Info: Tuta


Germany (14 Eyes)


Hybrid AES + RSA

Open Source

Client Apps Only

Onion Site



Free Plan - 1GB, 1 address, no custom domain. Paid plans start from €1 / month, and allow for a custom domain, 5 alias addresses and improved search and filters

Custom Domain

Yes (Premium Plan, €1.00/m)


Yes (€1 / month per 20 aliases) No catch-all

Mail Client Support


Security Audit

Apparently, but not published

Accepts Crypto

No (But ProxyStore gift cards accepted

Personal Info Required


Mobile App

Yes (Android and iOS)

Active Development



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