Fastmail

Polished, standards-based calendar but not end-to-end encrypted.

fastmail.com
Price
PaidNo free tier. From around $6/mo (about $60/yr); the calendar is included with the mail subscription.
Works on
Windows, macOS, Linux, Android, iOS, Web
Based in
Australia
Source code
Closed source

This is where you have to be clear about what you want, because private means different things. If your goal is escaping ad-tech profiling while keeping a polished, standards-based service that plays nicely with everything, Fastmail fits: full CalDAV, syncs natively with Apple Calendar and Thunderbird (and with Android through a helper app like DAVx5), and you pay with a subscription rather than your data. If your goal is that nobody, including the provider, can read your schedule, Fastmail does not qualify. It is not end-to-end encrypted so Fastmail can read your calendar. For that, choose Proton, Tuta, or a self-hosted setup like EteSync or Radicale.

Strengths

  • Full CalDAV and CardDAV; works with every standard app
  • Reliable, polished, long-running service
  • Subscription-funded, no ad profiling

Considerations

  • Not end-to-end encrypted; Fastmail can read your calendar
  • Closed source
  • No free tier, and no crypto payment
Listed inCalendars

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