5 Best European Google Calendar Alternatives in 2026
The best European alternative to Google Calendar in 2026 is Proton Calendar, based in Switzerland. All 5 options below are European-owned, GDPR-native and ranked by feature parity and relevance.
By the EU Alternatives team Last updated
Our top pick this year is Proton Calendar, but every option on this list is European-owned, GDPR-native, and production-ready. Worth a closer look: fruux, Calendar.online, SyncDate, Tuta Calendar.
Google Calendar alternatives are mainly Office & Collaboration. Browse any of those categories for a wider shortlist beyond this list.
Top European Google Calendar alternatives compared
| # | Alternative | Country | Open source | Free tier | Compare |
|---|---|---|---|---|---|
| 1 | Proton Calendar | Switzerland | No | No | vs Google Calendar → |
| 2 | fruux | Germany | No | No | vs Google Calendar → |
| 3 | Calendar.online | Germany | No | No | vs Google Calendar → |
| 4 | SyncDate | Romania | No | No | — |
| 5 | Tuta Calendar | Germany | No | No | — |
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Keep your schedule private with an end-to-end encrypted calendar. Benefit from Swiss privacy laws and a user-first approach. Manage events securely.
End-to-end encrypted calendar from Proton in Switzerland: events, reminders and sharing stay private under Swiss law, tightly integrated with Proton Mail.
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German sync service for contacts, calendars and tasks across devices using open CalDAV and CardDAV standards, built by the team behind the sabre/dav project.
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German online calendar for teams: share schedules through simple access links in the browser, with fine-grained permissions per calendar.
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Organize your schedule with robust, quantum-safe encryption. Keep events private, enjoy intuitive planning, and receive secure notifications. Your data, your rules.
German calendar that protects every event with quantum-safe encryption, keeping your schedule private with secure notifications you control.
