Tuta Calendar

Fully encrypted calendar tied to Tuta's own apps.

tuta.com
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Price
FreemiumFree plan with 1 GB and full encryption; paid from around €3/mo for more storage and calendars.
Works on
Windows, macOS, Linux, Android, iOS, Web
Based in
Germany
Source code
Open source
Encryption
End-to-end encrypted

Tuta encrypts the whole calendar, event titles, times, attendees, and notes so the provider cannot read your schedule. It comes with the encrypted Tuta mail account and runs through Tuta's own apps on every platform. The trade is no CalDAV: the encryption rules out standard sync so you stay inside Tuta's apps, reaching other software only through a Thunderbird add-on plus .ics import and export. Pick it if you want mail and calendar locked down together and are fine staying in one ecosystem.

Strengths

  • Every event field is end-to-end encrypted
  • Comes with the encrypted Tuta mail account
  • Open source, with apps on every platform

Considerations

  • No CalDAV so no standard sync
  • Locked to Tuta's own apps
Listed inCalendars

Tuta Calendar alternatives

Proton CalendarEncrypted calendar that comes with a Proton account.PeergosSelf-hostable encrypted calendar inside a private cloud.RadicaleLightweight CalDAV server you run yourself.EteSyncEncrypted calendar and contacts sync that plugs into your apps.