European Alternatives to Google Calendar
Google's calendar service, integrated with Gmail accounts. Multi-device sync, event sharing and deep integration with the Google ecosystem.
Google Calendar Features
- Free with a Google account
- Sync across Gmail, Drive, Meet
- 15 GB shared on Google Drive
- Gemini integrated into Calendar (by default)
- Web, Android, iOS apps
- Proprietary source code
Price: Free (with Google account)
Why leave Google Calendar?
- Personal Intelligence (Gemini) accesses your calendar by default since 2026 to personalize its answers
- A Gemini vulnerability was used to abuse Google Calendar invites in 2026 (Miggo Security research)
- Data stored in the US, accessible to authorities under the US CLOUD Act
- Your events feed Google's ad targeting business (237 billion dollars in 2024 ad revenue)
- Default retention of 18 months on Gemini interactions with your calendar
Recommended : Proton Calendar
End-to-end encrypted calendar from Proton (Mail, Drive, VPN). Titles, descriptions, locations and guests all encrypted — not even Proton can read them.
Country : CH
Compatibility Scores
- Migration : 80/100
- GDPR : 95/100
- Features : 90/100
- Overall Score : 89/100
Proton Calendar Features
- Free tier included in the Proton free account
- End-to-end encryption (titles, locations, guests)
- Polished web, iOS, Android apps
- Import .ics from Google/iCloud/Outlook
- Calendar sharing with access controls
- Bundle with Mail + Drive + VPN + Pass available
Price: Free / Plus from 4,99€/month (24-month plan) / Unlimited at 9,99€/month
Why this choice?
Proton Calendar is our recommendation for Google Calendar users thanks to its free tier included in the Proton free account and its end-to-end encryption (titles, locations, guests all encrypted). It's the easiest way to leave Google while gaining Swiss jurisdiction outside the CLOUD Act and stopping Gemini from accessing your appointments.
Switch from Google Calendar to Proton Calendar
Strengths
- Free tier with E2E encryption (Google does not encrypt your events)
- No Gemini or AI on your data
- Swiss jurisdiction outside the CLOUD Act
- Polished iOS/Android apps with Google parity
- Bundle with Proton Mail/Drive/VPN/Pass available
Weaknesses
- No native Meet/Maps integration
- Less powerful search (E2E limitation)
- No AI assistant for the calendar
All Alternatives
- Proton Calendar (CH) — Score : 89/100 (Recommended)
- Tuta Calendar (DE) — Score : 83/100
- Infomaniak Calendar (CH) — Score : 81/100