# Proton Calendar

> End-to-end encrypted calendar from the maker of Proton Mail

Proton Calendar is an encrypted calendar from Proton AG in Switzerland. Event titles, descriptions, locations and attendees are end-to-end encrypted so that Proton cannot read them. It is included free with a Proton account, limited to 3 calendars; calendar sharing, booking pages and up to 25 calendars come with Proton's paid plans, since Calendar is not sold on its own.

- **Category:** Calendar & Scheduling
- **Made by:** Proton AG
- **Website:** https://proton.me/calendar
- **Runs on:** Web, macOS, Windows, Linux, iOS, Android
- **Facts last checked:** Oct 5, 2026

## Pricing

Proton Calendar has a free plan. Paid plans start at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.

- **Pricing model:** Free plan
- **Free plan:** Proton Free: 3 personal calendars with end-to-end encryption and event invitations. No calendar sharing or booking pages, and the desktop app is a 14-day trial.
- **Free trial:** None listed.

| Plan | Price | What you get |
| --- | --- | --- |
| Proton Free | $0 | 3 personal calendars, end-to-end encryption, and sending and receiving invitations. |
| Mail Plus | $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly | 25 personal calendars, calendar sharing and 1 booking page, plus 15 GB of storage and 10 email addresses. |
| Proton Unlimited | $9.99 per month, billed every 12 months ($119.88); $12.99 billed monthly | The same calendar features as Mail Plus, bundled with 500 GB of storage and Proton's VPN, password manager and cloud storage. |
| Workspace Standard | $12.99 per user / month, billed every 12 months ($155.88) | Business suite with 25 calendars and 25 booking pages per user, 1 TB of storage per user and 15 custom email domains. |
| Workspace Premium | $19.99 per user / month, billed every 12 months ($239.88) | Everything in Workspace Standard, plus 3 TB of storage per user, 20 custom email domains and data retention policies. |
| Enterprise | Custom | All Proton services in a customizable package with a dedicated account manager; priced through sales. |

Read from https://proton.me/mail/pricing?product=calendar on Oct 5, 2026. Prices change, so confirm with Proton Calendar before buying.

## Ways to pay less

- **20% off Mail Plus on the 12-month plan** (Annual discount): Proton's pricing page lists Mail Plus at $3.99 a month when billed every 12 months ($47.88), against $4.99 billed monthly. Proton Unlimited is $9.99 instead of $12.99. Source: https://proton.me/mail/pricing?product=calendar
- **Student discount for the first 12 months** (Education): Students verified through Student Beans get 50% off Mail Plus and 62% off Proton Unlimited for the first 12 months; the plan then renews at the regular price. Source: https://proton.me/student
- **Reduced pricing for registered nonprofits** (Nonprofit): Registered nonprofits can request discounted pricing on Proton's business plans from the sales team. No fixed percentage is published. Source: https://proton.me/business/nonprofit-discount

## Key features

- **End-to-end encrypted events:** An event's title, description, location and attendees are encrypted on your device. Events received from people on other calendar services are stored with zero-knowledge encryption.
- **Appointment booking pages:** Publish a booking page that shows only the times you choose and syncs with your calendars to prevent double bookings. Confirmed meetings can include a Proton Meet link. Paid plans only.
- **Calendar sharing:** On paid plans, share a calendar by link or by inviting people directly, showing either full event details or only your availability.
- **Works with Proton Mail:** Send invitations from a Proton Mail address, manage them without leaving the inbox, and add events received by email, such as flights or meetings, to the calendar.
- **Recurring events and reminders:** Events can repeat daily, weekly, monthly or on a custom pattern, with several reminders or email alerts each. Views switch between day, week and month.
- **Import and calendar subscriptions:** The Easy Switch tool imports existing calendars from other providers, and you can subscribe to calendars that other people keep on a different service.

## Good for

- People who want event details kept unreadable to the provider
- Existing Proton Mail users who want invitations handled in the inbox
- Privacy-focused organizations standardizing on Proton's business suite

## Worth knowing

- Proton Free allows 3 personal calendars; Mail Plus and higher plans allow 25.
- Calendar sharing and booking pages need a paid plan, and Mail Plus and Proton Unlimited include only 1 booking page.
- Calendar has no subscription of its own: paid features come with Mail Plus, Proton Unlimited or a business plan.
- Desktop use is through the Proton Mail app for Mac, Windows and Linux, a 14-day trial on free accounts; the Linux app is labeled beta.

## What people say

- **App Store rating of the iPhone and iPad app:** 4.1 out of 5 from 1,507 ratings in the United States, read Oct 5, 2026. This is the store's rating of the app, not a score from ToolGPA. Source: https://apps.apple.com/us/app/id1514709943

## Works with

Proton Mail, Proton Meet

**Tags:** Calendar, End-to-end encrypted, Open source, Booking links

## Alternatives

- [Tuta Calendar](https://toolgpa.com/tools/tuta-calendar): End-to-end encrypted calendar bundled with Tuta Mail. [Compare](https://toolgpa.com/compare/proton-calendar-vs-tuta-calendar)
- [Google Calendar](https://toolgpa.com/tools/google-calendar): Online calendar from Google, free with a personal account. [Compare](https://toolgpa.com/compare/google-calendar-vs-proton-calendar)
- [Apple Calendar](https://toolgpa.com/tools/apple-calendar): Free built-in calendar for iPhone, iPad, Mac and iCloud.com. [Compare](https://toolgpa.com/compare/apple-calendar-vs-proton-calendar)
- [Fantastical](https://toolgpa.com/tools/fantastical): Calendar and tasks app for Apple devices, Windows and Googlebook. [Compare](https://toolgpa.com/compare/fantastical-vs-proton-calendar)
- [Notion Calendar](https://toolgpa.com/tools/notion-calendar): Free calendar app that connects to Notion databases. [Compare](https://toolgpa.com/compare/notion-calendar-vs-proton-calendar)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 5, 2026:

- https://proton.me/calendar
- https://proton.me/mail/pricing?product=calendar
- https://proton.me/business/plans?product=calendar
- https://proton.me/support/proton-plans
- https://proton.me/calendar/features
- https://proton.me/calendar/security
- https://proton.me/calendar/download
- https://proton.me/business/calendar
- https://proton.me/business/calendar/appointment-scheduling
- https://proton.me/support/calendar-appointment-scheduling
- https://proton.me/student
- https://proton.me/business/nonprofit-discount

Page: https://toolgpa.com/tools/proton-calendar
Listed by ToolGPA (toolgpa.com).