Head-to-head · Calendar
Google Calendar vs Proton Calendar
Which one to pick in 2026 — comparing 🇺🇸 Google Calendar with the European alternative 🇪🇺 Proton Calendar on the things that actually decide who can read your data.
🇺🇸 Google Calendarvs🇪🇺 Proton Calendar
Verdict
Who has stronger privacy guarantees by law?
Proton Calendar — GDPR-native and outside the US CLOUD Act / FISA 702 reach.
Which one encrypts your data end-to-end by default?
Proton Calendar ships E2E encryption by default. Google Calendar does not.
Which one tracks you for ads?
Proton Calendar also tracks for ads — verify in the table.
Which one is open source?
Proton Calendar is open source. Google Calendar is proprietary.
Side-by-side
Google Calendar vs Proton Calendar — full comparison
Criteria
🇪🇺 Proton Calendar
🇺🇸 Google Calendar
Headquarters
Geneva, Switzerland
Mountain View, USA
Jurisdiction
Switzerland
USA
Data location
Switzerland
Global
GDPR-native
Yes
No
CLOUD Act / FISA exposed
No
Yes
Ad tracking
Yes
No
End-to-end encryption
Yes
No
Open source
Yes
No
Ownership
Proton AG
Alphabet Inc.
Founded
2018
2006
Make the switch
Try Proton Calendar instead of Google Calendar
Encrypted calendar from Proton.
Other European alternatives to Google Calendar