European alternative to
Calendar Services
A calendar service is a digital calendar that helps users manage appointments and scheduling, often with shared calendars and iCalendar-based device sync.
4 Alternatives Found
Proton Calendar
Switzerland
Calendar service from Proton (Switzerland) with zero-knowledge encryption. The company cannot read the content of calendar entries even though they are stored on Proton's servers. Integrated with Proton Mail.
Key Features
Tuta Calendar
Germany
End-to-end encrypted calendar from Germany, included with Tuta Mail (formerly Tutanota). Available as iOS, Android, and web app.
Key Features
Calendar.online
Germany
German calendar service allowing users to create calendars with granular access permissions — such as 'read without details' links for sharing availability without revealing event content. Supports sub-calendars for organizing different types of dates.
Key Features
fruux
Germany
German CalDAV and CardDAV service with an open-source server component. Syncs calendars and contacts across all CalDAV/CardDAV-compatible clients without requiring a specific app.
Key Features
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