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Tuta Calendar alternatives: 5 apps ranked by verified data

Facts checked Oct 25, 2026AppBreakup editorialHow we rank

Common reasons people leave Tuta Calendar: free plan limited to one calendar, and no CalDAV sync with other calendar apps. We ranked 5 alternatives by how directly each one replaces Tuta Calendar, then by reviews, real visits and how recently each app's facts were checked against its own website. Proton Calendar currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1Proton Calendar logoProton CalendarFree plan + paidYesWeb, iOS, Android +34 of 466.5
2GNOME Calendar logoGNOME CalendarOpen sourceYesLinux4 of 455.3
  1. Proton Calendar logo

    1. Proton CalendarTop pick

    Best for: Privacy-minded people and teams who want encrypted calendars, ideally with Proton Mail

    Free plan + paidOpen sourceWeb, iOS, Android, macOS, Windows, Linux

    66.5

    score / 100

    Why switch from Tuta Calendar

    Encrypted calendar from a Swiss company, with booking pages on paid plans.

    Pros

    • End-to-end encrypted event details
    • Swiss jurisdiction and open-source apps
    • Free plan, bundled with Proton Mail on paid plans

    Cons

    • No direct CalDAV sync with third-party clients
    • Fewer integrations than Google Calendar
    • Best value only if you use other Proton apps
    Visit Proton Calendar Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Proton Calendar a good Tuta Calendar alternative?

    Verified facts

    4 of 4 verified
    End-to-end encryption
    Yes
    Checked Oct 25, 2026proton.me(opens source in a new tab)
    Jurisdiction
    Switzerland
    Checked Oct 25, 2026proton.me(opens source in a new tab)
    Desktop apps
    macOS, Windows, Linux
    Checked Oct 25, 2026proton.me(opens source in a new tab)
    Free plan
    Yes
    Checked Oct 25, 2026proton.me(opens source in a new tab)
  2. GNOME Calendar logo

    2. GNOME Calendar

    Best for: Linux users on GNOME who want a clean calendar synced through online accounts

    Open sourceLinux

    55.3

    score / 100

    Why switch from Tuta Calendar

    Open-source Linux desktop calendar that works with your own CalDAV server.

    Pros

    • Free, open source and well integrated with GNOME
    • Syncs Google, Nextcloud and CalDAV via system accounts
    • Works offline with local calendars

    Cons

    • Linux only
    • No tasks or scheduling links
    • Fewer options than KOrganizer or Thunderbird
    Visit GNOME Calendar Details and reviews
    How this score is calculated
    Editorial fit ×0.363
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is GNOME Calendar a good Tuta Calendar alternative?

    Verified facts

    4 of 4 verified
    Sync services
    Nextcloud, Google Calendar, CalDAV/WebDAV
    Checked Oct 25, 2026apps.gnome.org(opens source in a new tab)
    Offline mode
    Yes, local calendars
    Checked Oct 25, 2026apps.gnome.org(opens source in a new tab)
    Install
    Flathub
    Checked Oct 25, 2026apps.gnome.org(opens source in a new tab)
    Backend
    Evolution data server
    Checked Oct 25, 2026apps.gnome.org(opens source in a new tab)

The best Tuta Calendar alternative for…

The highest-ranked app in this list for each need.

Proton Calendar logo

Best Tuta Calendar alternative for most people

Proton Calendar

Encrypted calendar from a Swiss company, with booking pages on paid plans.

Fossify Calendar logo

Best Tuta Calendar alternative for a free option

Fossify Calendar

Open-source Android calendar that keeps data on your device.

Google Calendar logo

Best Tuta Calendar alternative for a free plan you can upgrade

Google Calendar

Much richer integrations if encryption isn't essential.

GNOME Calendar logo

Best Tuta Calendar alternative for open source

GNOME Calendar

Open-source Linux desktop calendar that works with your own CalDAV server.

Proton Calendar logo

Best Tuta Calendar alternative for Mac

Proton Calendar

Encrypted calendar from a Swiss company, with booking pages on paid plans.

Proton Calendar logo

Best Tuta Calendar alternative for Windows

Proton Calendar

Encrypted calendar from a Swiss company, with booking pages on paid plans.

Proton Calendar logo

Best Tuta Calendar alternative for Linux

Proton Calendar

Encrypted calendar from a Swiss company, with booking pages on paid plans.

Zoho Calendar logo

Best Tuta Calendar alternative for iPhone and Android

Zoho Calendar

Free hosted calendar with sharing and booking features.

Proton Calendar logo

Best Tuta Calendar alternative for working in the browser

Proton Calendar

Encrypted calendar from a Swiss company, with booking pages on paid plans.

Tuta Calendar alternatives: common questions

What is the best alternative to Tuta Calendar?

Proton Calendar ranks first right now. Encrypted calendar from a Swiss company, with booking pages on paid plans. Fossify Calendar and Google Calendar follow it in our ranking.

Is there a free alternative to Tuta Calendar?

Yes. Proton Calendar (free plan + paid), Fossify Calendar (open source), Google Calendar (free plan + paid) and Zoho Calendar (free) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Tuta Calendar?

Yes: Proton Calendar, Fossify Calendar and GNOME Calendar.

Which Tuta Calendar alternatives work on Linux?

Proton Calendar and GNOME Calendar run on Linux.

Why do people switch from Tuta Calendar?

The complaints we hear most: free plan limited to one calendar; no CalDAV sync with other calendar apps; basic features compared with mainstream calendars.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Tuta Calendar, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.