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Proton Calendar alternatives

Proton Calendar compared with 10 alternatives: Tuta Calendar, Google Calendar, Apple Calendar, Fantastical, Notion Calendar and 5 more.

Proton Calendar has a free plan. Paid plans start at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly. 9 of the 10 alternatives are free or have a free plan. One more offers a free trial.

10 tools · Listings checked up to Oct 9, 2026 · Where the facts come from

At a glance

ToolPriceFree planRuns on
Proton CalendarThis toolFree plan · from $3.99/moYesWeb, macOS, Windows, Linux, iOS, Android
Tuta CalendarFree plan · from €3/moYesWeb, macOS, Windows, Linux, iOS, Android
Google CalendarFree plan · from $7/moYesWeb, iOS, Android
Apple CalendarFreeFreeWeb, macOS, iOS
FantasticalFree plan · from $4.75/moYesmacOS, Windows, iOS
Notion CalendarFreeFreeWeb, macOS, Windows, iOS, Android
EtarFreeFreeAndroid
Fossify CalendarFreeFreeAndroid
GNOME CalendarFreeFreeLinux
OurCalFree trial · from $6.99/moTrial onlymacOS, iOS, Android
Zoho CalendarFree plan · from $1/moYesWeb, iOS, Android

How each one differs from Proton Calendar

  1. Tuta Calendar

    End-to-end encrypted calendar bundled with Tuta Mail

    • Tuta Calendar starts at €3 per month, paid yearly (€3.60 paid monthly). Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Proton Calendar also covers booking links.

    Suits: People who want a calendar their provider cannot read

    Tuta Calendar vs Proton CalendarTuta Calendar pricing and details

  2. Google Calendar

    Online calendar from Google, free with a personal account

    • Google Calendar starts at $7 per user / month with a 1-year commitment (Workspace Business Starter). Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only Proton Calendar lists macOS, Windows and Linux apps.
    • Proton Calendar is open source and end-to-end encrypted, according to its own site.
    • Google Calendar also covers tasks.

    Suits: Anyone who already has a Google Account and wants a free calendar

    Google Calendar vs Proton CalendarGoogle Calendar pricing and details

  3. Apple Calendar

    Free built-in calendar for iPhone, iPad, Mac and iCloud.com

    • Apple Calendar is free. Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only Proton Calendar lists Windows, Linux and Android apps.
    • Proton Calendar is open source and end-to-end encrypted, according to its own site.
    • Apple Calendar also covers tasks and natural-language input.
    • Proton Calendar also covers booking links.

    Suits: People with an iPhone, iPad or Mac who want a calendar at no cost

    Apple Calendar vs Proton CalendarApple Calendar pricing and details

  4. Fantastical

    Calendar and tasks app for Apple devices, Windows and Googlebook

    • Fantastical starts at $4.75 per month, billed annually ($6.99 billed monthly). Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only Proton Calendar lists a web app.
    • Only Proton Calendar lists Linux and Android apps.
    • Proton Calendar is open source and end-to-end encrypted, according to its own site.
    • Fantastical also covers templates, tasks and natural-language input.

    Suits: People with Google, iCloud and Microsoft calendars who want them in one app

    Fantastical vs Proton CalendarFantastical pricing and details

  5. Notion Calendar

    Free calendar app that connects to Notion databases

    • Notion Calendar is free. Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only Proton Calendar lists a Linux app.
    • Proton Calendar is open source and end-to-end encrypted, according to its own site.

    Suits: Notion users who want database deadlines next to their meetings

    Notion Calendar vs Proton CalendarNotion Calendar pricing and details

  6. Etar

    Open-source Material Design calendar for Android

    • Etar is free. Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only Proton Calendar lists a web app.
    • Only Proton Calendar lists macOS, Windows, Linux and iOS apps.
    • Proton Calendar is end-to-end encrypted, according to its own site.
    • Proton Calendar also covers booking links.

    Suits: Android users who want a plain calendar with open source code

    Etar vs Proton CalendarEtar pricing and details

  7. Fossify Calendar

    Open-source Android calendar with no ads, tracking or account

    • Fossify Calendar is free. Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only Proton Calendar lists a web app.
    • Only Proton Calendar lists macOS, Windows, Linux and iOS apps.
    • Proton Calendar is end-to-end encrypted, according to its own site.
    • Proton Calendar also covers booking links.

    Suits: Android users who want a calendar without ads, tracking or sign-up

    Fossify Calendar vs Proton CalendarFossify Calendar pricing and details

  8. GNOME Calendar

    Free, open-source calendar app for the GNOME desktop on Linux

    • GNOME Calendar is free. Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only Proton Calendar lists a web app.
    • Only Proton Calendar lists macOS, Windows, iOS and Android apps.
    • Proton Calendar is end-to-end encrypted, according to its own site.
    • Proton Calendar also covers booking links.

    Suits: GNOME desktop users who want a calendar that matches the rest of the system

    GNOME Calendar vs Proton CalendarGNOME Calendar pricing and details

  9. OurCal

    End-to-end encrypted shared calendar with a chat on every event

    • OurCal starts at $6.99 per month for a group of up to 6 people. Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Proton Calendar has a free plan. OurCal does not, though it has a free trial.
    • Only Proton Calendar lists a web app.
    • Only Proton Calendar lists Windows and Linux apps.
    • Proton Calendar is open source, according to its own site.

    Suits: Couples and families split between iPhone and Android

    OurCal vs Proton CalendarOurCal pricing and details

  10. Zoho Calendar

    Free online calendar for teams, part of Zoho Mail and Workplace

    • Zoho Calendar starts at $1 per user / month, billed annually (Zoho Mail Lite). Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly.
    • Only Proton Calendar lists macOS, Windows and Linux apps.
    • Proton Calendar is open source and end-to-end encrypted, according to its own site.
    • Zoho Calendar also covers natural-language input.

    Suits: Teams already using Zoho Mail or Zoho Workplace

    Zoho Calendar vs Proton CalendarZoho Calendar pricing and details

Limits worth knowing in Proton Calendar

  • 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.
Proton Calendar pricing and details

Common questions

What are the alternatives to Proton Calendar?

The alternatives to Proton Calendar in this directory are Tuta Calendar, Google Calendar, Apple Calendar, Fantastical, Notion Calendar, Etar, Fossify Calendar, GNOME Calendar, OurCal and Zoho Calendar. Each one has a side-by-side comparison with Proton Calendar.

Is there a free alternative to Proton Calendar?

Yes. Apple Calendar, Notion Calendar, Etar, Fossify Calendar and GNOME Calendar are free to use. Tuta Calendar, Google Calendar, Fantastical and Zoho Calendar have a free plan alongside paid ones.

When were these prices checked?

Each listing shows its own date. On this page they run from Oct 4, 2026 to Oct 9, 2026. Vendors change prices without notice, so confirm on their site before you buy.

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