What is Proton Calendar used for?

Proton Calendar is an end-to-end encrypted calendar from Proton for private scheduling, shared calendars and appointment booking. It is a good fit for privacy-conscious users replacing a mainstream calendar and businesses needing an encrypted team calendar.

Is Proton Calendar free?

Yes. Proton Calendar has a free plan. Proton Calendar comes with a Proton account. The free plan has one personal calendar; paid Mail Plus and Unlimited plans allow up to 25. Prices were not visible in the page text.

Is Proton Calendar open source?

No. Proton Calendar is proprietary (closed-source) software and can't be self-hosted. Open-source alternatives to Proton Calendar include Radicale, Baïkal and Manage My Damn Life.

What are some alternatives to Proton Calendar?

Proton Calendar competes with Google Calendar, Fantastical and Zoho Calendar. For open-source options, see Enlisted's ranked list of open-source Proton Calendar alternatives.

Proton Calendar: features, pricing and alternatives

About Proton Calendar

Proton Calendar is a calendar app from Proton, the company behind Proton Mail and Proton VPN, built around privacy. Event details are encrypted so the provider cannot read the contents of a user's schedule, and the product is pitched as a private alternative to mainstream calendar services.

It is available on the web, on iOS and Android, and as desktop apps for macOS, Windows and Linux. Features include shared calendars, event sharing, appointment scheduling and a team calendar for business accounts. Proton also publishes security material for business customers, including references to HIPAA, GDPR and ISO 27001.

Proton Calendar is a hosted commercial product that is part of the wider Proton ecosystem, which includes mail, drive, password manager and other tools. Users can start with a free account, and paid personal and business plans are listed on the Proton pricing page.

Key features

End-to-end encrypted calendar events
Shared calendars and event sharing
Appointment booking pages
Team calendar for business accounts
Apps for web, mobile and desktop

Good fit for

→Privacy-conscious users replacing a mainstream calendar
→Businesses needing an encrypted team calendar

Tags: calendar; encrypted; privacy; scheduling; proton; shared-calendars; saas

Proton Calendar: questions and answers

What is Proton Calendar used for?: Proton Calendar is an end-to-end encrypted calendar from Proton for private scheduling, shared calendars and appointment booking. It is a good fit for privacy-conscious users replacing a mainstream calendar and businesses needing an encrypted team calendar.
Is Proton Calendar free?: Yes. Proton Calendar has a free plan. Proton Calendar comes with a Proton account. The free plan has one personal calendar; paid Mail Plus and Unlimited plans allow up to 25. Prices were not visible in the page text.
Is Proton Calendar open source?: No. Proton Calendar is proprietary (closed-source) software and can't be self-hosted. Open-source alternatives to Proton Calendar include Radicale, Baïkal and Manage My Damn Life.
What are some alternatives to Proton Calendar?: Proton Calendar competes with Google Calendar, Fantastical and Zoho Calendar. For open-source options, see Enlisted's ranked list of open-source Proton Calendar alternatives.