What is Proton Calendar?
Proton Calendar is a privacy-focused calendar service from Switzerland, developed by the same team behind ProtonMail. Unlike Google Calendar or Outlook Calendar, Proton Calendar uses zero-knowledge encryption to ensure that even Proton cannot read your events, appointments, or personal information. All calendar data is encrypted on your device before being stored on Proton's servers in Switzerland. The service integrates seamlessly with other Proton services and provides all the features you expect from a modern calendar while maintaining the highest standards of privacy protection.
Key Features
- ✓Zero-knowledge encryption for all events
- ✓End-to-end encrypted event sharing
- ✓Multiple calendars with color coding
- ✓Event reminders and notifications
- ✓Recurring events support
- ✓Integration with Proton Mail
- ✓Web app and mobile apps
- ✓Import from other calendar services
- ✓CalDAV support coming
- ✓Timezone support
- ✓Event invitations with encryption
- ✓Part of Proton ecosystem
🔒 Privacy & Data Protection
Proton Calendar provides genuine calendar privacy through zero-knowledge encryption. Your event titles, descriptions, locations, and attendees are encrypted before leaving your device. Even Proton employees cannot see what's in your calendar – the decryption keys exist only on your devices. As a Swiss company, Proton operates outside US and EU jurisdiction, under Switzerland's strong privacy laws. For anyone concerned about their schedule being analyzed or monetized, Proton Calendar offers a truly private alternative.
Best For
💰 Pricing
Proton Calendar is included free with a Proton account, with basic calendar functionality. Premium features come with Proton paid plans. Mail Plus at €4.99/month includes enhanced calendar features. Proton Unlimited at €12.99/month provides the full Proton suite including Calendar, Mail, Drive, VPN, and Pass. The free tier provides essential calendar functionality for privacy-conscious individuals.
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