Proton Calendar vs Google Calendar
Proton Calendar is a European alternative to Google Calendar: same office & collaboration use case, headquartered in Switzerland and governed by Swiss FADP + GDPR for EU users, while Google Calendar is based in the United States.
By the EU Alternatives team Last updated
Keep your schedule private with an end-to-end encrypted calendar. Benefit from Swiss privacy laws and a user-first approach. Manage events securely.
- Jurisdiction
- Switzerland / EFTA
- Primary privacy law
- Swiss FADP + GDPR for EU users
- US CLOUD Act exposure
- No
- Open source
- No
- Free tier
- No
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Google Calendar became the default way a team finds a free slot, and the shared availability view is what makes migrating painful, not the events themselves. It is free with a Google account. Calendars live with Google LLC in the United States, and every invitation hands it the attendee list by design.
- Jurisdiction
- United States
- GDPR by default
- Requires DPA + TIA
- US CLOUD Act exposure
- Yes
Proton Calendar vs Google Calendar at a glance
| Proton Calendar | Google Calendar | |
|---|---|---|
| Headquarters | Switzerland | United States |
| Data jurisdiction | Switzerland / EFTA | United States |
| Primary privacy law | Swiss FADP + GDPR for EU users | Requires DPA + transfer assessment |
| US CLOUD Act exposure | No | Yes |
| Best for | Teams that need office & collaboration built for European data-protection requirements | Teams already invested in the Google Calendar ecosystem |
Choose Proton Calendar if…
- You want a provider governed by a European privacy regime
- GDPR or public-sector data-protection requirements apply to you
- You'd rather back the European tech ecosystem
Stick with Google Calendar if…
- You depend on integrations only available in the Google Calendar ecosystem
- Your organisation has no EU data-residency constraints
- Migration costs outweigh the jurisdiction benefits for now
Why choose Proton Calendar over Google Calendar?
The decisive argument is data jurisdiction. Google Calendar is headquartered in the United States, which means personal data processed through it can be subject to non-EU legal regimes: the US CLOUD Act, FISA 702, or similar laws depending on the provider. After the 2020 Schrems II ruling, EU organisations must carry out a transfer impact assessment for every such data flow.
Proton Calendar removes that overhead. As a Switzerland-based provider, it operates under Swiss FADP + GDPR for EU users, and data stays in Switzerland, which the European Commission recognises as offering an adequate level of protection. For regulated sectors such as health, public administration, and finance, that's not a nice-to-have but a requirement. For everyone else, it's concentration-risk insurance: you avoid depending on a single jurisdiction that can change the rules without warning.