Proton Calendar

End-to-end encrypted calendar from Proton with a free tier; apps for web, iOS, Android, macOS, Windows and Linux.

WebAccount requiredfreemiumglobal

An end-to-end encrypted calendar from Proton that keeps event details — title, description, location and invitees — private so the provider cannot read them. Available on web, iOS, Android, macOS, Windows and Linux with a free tier, it’s designed for people who need a cross-platform calendar protected by Swiss privacy law, such as privacy-conscious individuals and students.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of Proton Calendar - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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