Head-to-head · 2026

Proton Calendar vs Google Calendar

Proton Calendar is a European alternative to Google Calendar: same office & collaboration use case, headquartered in Switzerland and operating under GDPR by default, while Google Calendar is based in the United States.

By the EU Alternatives team Last updated 11 July 2026

European alternative

Proton Calendar

Switzerland

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: EU / EEA
GDPR by default: Yes
US CLOUD Act exposure: No
Open source: No
Free tier: No

See full Proton Calendar profile

Non-EU

Google Calendar

Google Calendar · US

Google Calendar, a non-EU product.

Jurisdiction: US
GDPR by default: Requires DPA + TIA
US CLOUD Act exposure: Yes

All European alternatives to Google Calendar

Proton Calendar vs Google Calendar at a glance

	Proton Calendar	Google Calendar
Headquarters	Switzerland	US
Data jurisdiction	EU / EEA	US law applies
GDPR by default	Yes	Requires DPA + transfer assessment
US CLOUD Act exposure	No	Yes
Open source	No	—
Free tier	No	—
Best for	Teams that need office & collaboration with EU data residency	Teams already invested in the Google Calendar ecosystem

Choose Proton Calendar if…

You want your data to stay under EU law without extra legal paperwork
GDPR compliance or public-sector 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 US, 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 natively under GDPR, and data stays inside the EU/EEA by default. 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 non-EU jurisdiction that can change the rules without warning.

Frequently asked questions

Is Proton Calendar a good alternative to Google Calendar?

Yes. Proton Calendar is one of the top-ranked European alternatives to Google Calendar in our directory, covering the same office & collaboration use case. It is headquartered in Switzerland, keeping your data under EU law by default.

What's the main difference between Proton Calendar and Google Calendar?

The biggest difference is jurisdiction: Proton Calendar is based in Switzerland and operates under GDPR and EU data-protection law, while Google Calendar is headquartered in US and may transfer data outside the EU. For regulated industries or organisations following Schrems II guidance, this difference is decisive.

Is Proton Calendar GDPR-compliant?

Proton Calendar is a European company based in Switzerland, so GDPR compliance is the default operating model rather than a bolt-on. No transfer impact assessment is required for EU customers, unlike when using Google Calendar.

How do I migrate from Google Calendar to Proton Calendar?

Start by exporting your data from Google Calendar (most providers offer an export in their settings). Then import into Proton Calendar using its native import tool or migration guide. Running both in parallel for a week catches any feature or workflow gaps before you fully switch.

Other European alternatives to Google Calendar