Calendars
Proton Calendar privacy rating
End-to-end encrypted calendar from Proton for web, Android and iOS. Supports shared calendars, recurring events, time zones, ICS import and subscriptions, and integrates with Proton Mail.
Summary
Proton Calendar scores 60 out of 100 (grade C) on the calendars criteria. It meets 1 of 4 criteria: no ads or data sales. It partly meets open source, no trackers or telemetry and independent audit. It is based in Switzerland: Not in the Five, Nine or Fourteen Eyes; GDPR-style data protection law.
Score 60 out of 100. How scoring works
Criteria
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Partial
Open source Weight 3 of 3
Is all the source code needed to run the product public?
The web, Android and iOS apps are GPL-3.0. The server code is not published.
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Partial
No trackers or telemetry Weight 3 of 3
Are the website and apps free of third-party trackers, with any analytics anonymous and any telemetry off by default?
No third-party trackers, but anonymous usage statistics and crash reports are sent by default and can be turned off.
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Yes
No ads or data sales Weight 2 of 3
Is the product funded without advertising, ad targeting or selling user data?
Funded by paid plans. The privacy policy rules out targeted advertising and profiling.
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Partial
Independent audit Weight 2 of 3
Has an independent security or privacy audit been published within the last three years?
Securitum published a full audit of the Proton Mail and Calendar web apps, but it is older than three years.