Proton Calendar
Select the "Mail Plus" or "Proton Unlimited" paid plans for more features.
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Encrypted Calendars: Secure Your Schedule and Privacy Today
Private alternatives to Google Calendar, vetted against our public criteria.
Tutanota
Tutanota: Free, Cross-Platform and Zero-Knowledge Calendar
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EteSync
If you decide to self-host EteSync you won't have to pay for the subscription. Tutorial here .
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Keep your schedule safe and private with our encrypted calendar solutions. Easy to use, secure and reliable. Protect your privacy with encrypted calendars. Get started today!