Tuta Calendar
End-to-end encrypted calendar bundled with Tuta Mail
Tuta Calendar report card
Very good · out of 4.0 · graded Oct 9, 2026
Best for a calendar your provider can't read
Don't fancy a company reading your diary? Tuta Calendar encrypts events, invitations and even reminder notifications end to end, and the apps are open source. It comes with a Tuta account, free for one calendar. The trade-off is that it keeps to itself: other calendars come in by import, with no two-way sync to Google or Outlook.
Who Tuta Calendar is for
- Great if you want a calendar that even its own provider can't read
- Handy when you already use Tuta Mail and want email, contacts and calendar in one account
- Good for Linux users after an open-source desktop calendar client
Who Tuta Calendar is not for
- Skip it if you need it kept in step with a Google or Outlook calendar, as it only imports
- Tight if you're staying free and want to send invitations or share a calendar
- Not for you if you only want a calendar, since the paid features come with Tuta's mail plans
Why Tuta Calendar gets a 3.2
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- AValue for moneyTuta's lowest paid personal plan is €3 a month paid yearly, €3.60 monthly, taxes included. That's under what most calendar apps charge, and it's Tuta's encrypted email, unlimited calendars and 20 GB of storage in one. The calendar isn't sold on its own.
- BFree plan and trialThe Free plan gives you one encrypted calendar and 1 GB, with apps on every platform. But there's no calendar sharing, no event invitations and no offline support, so it's a calendar for you alone. Those limits are tight.
- BFeaturesEnd-to-end encryption on events, invitations and shared calendars, with reminders kept hidden from your phone's operating system. On paid plans you can share with read or write rights. But the calendar page mentions no two-way sync with Google or Outlook, only import.
- BEase of useIt's part of your Tuta account, so if you use Tuta Mail it's already there, and old calendars import in the settings. We have no App Store rating on record to go by, so it stops at a B.
- BPlatforms and integrationsIt runs on everything: web, Windows, macOS, Linux, iPhone and Android, with the Android app on F-Droid too. But the only thing it connects to is Tuta Mail, and no API is listed. That keeps it at a B.
What these grades rest on. Graded from this listing, whose facts were read from Tuta's own pages on 5 October 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/tuta-calendar#review"><img src="https://toolgpa.com/badge/tuta-calendar.svg" alt="Tuta Calendar: 3.2 GPA on ToolGPA" width="196" height="56"></a>What is Tuta Calendar?
Tuta Calendar is the encrypted calendar from Tutao GmbH, the German company behind Tuta Mail. Events, invitations, shared calendars and reminder notifications are encrypted end to end, and the apps are open source. It comes with every Tuta account: the free plan includes one calendar, while sharing, event invitations and unlimited calendars come with Tuta's paid plans, because the calendar is not sold on its own.
Tuta Calendar has a free plan. Paid plans start at €3 per month, paid yearly (€3.60 paid monthly). See every plan
Good for
- People who want a calendar their provider cannot read
- Tuta Mail users who want email, contacts and calendar in one account
- Linux users looking for an open-source desktop calendar client
Worth knowing
- The Free plan includes one calendar and has no calendar sharing, event invitations or offline support.
- Calendar has no subscription of its own: paid features come with Tuta's paid personal or business mail plans.
- Prices are listed in euros: personal plans include taxes, business plans exclude them, and totals can vary with payment platform fees and exchange rates.
- Other calendars are brought in by import; the calendar page mentions no two-way sync with Google or Outlook calendars.
Key features
- End-to-end encryption
- Events, invitations and shared calendars are encrypted end to end with what Tuta calls quantum-safe encryption, so the provider cannot read them.
- Encrypted reminders
- Event reminders arrive as push notifications on phones and computers. They are sent encrypted and kept hidden from the phone's operating system.
- Calendar sharing
- On paid plans a calendar can be shared with family or colleagues with read only, read and write, or write and manage sharing rights.
- Event invitations
- Paid plans can send and receive calendar invitations, and can send one encrypted to someone outside Tuta using a shared password.
- Apps on every platform
- Apps for Android and iPhone, open-source desktop clients for Windows, macOS and Linux, and a browser version. The Android app is also offered through F-Droid.
- Built into Tuta Mail
- The calendar shares an account with Tuta's encrypted email and contacts, and existing calendars can be imported in the settings.
Tuta Calendar pricing
- Starts at
- €3 per month, paid yearly (€3.60 paid monthly)
- Free plan
- One encrypted calendar and 1 GB of storage, with web, mobile and desktop apps. No calendar sharing, event invitations or offline support.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Free | €0 | One encrypted calendar, 1 GB of storage and apps on every platform. No calendar sharing or event invitations. |
| Revolutionary | €3per month, paid yearly (€3.60 paid monthly), incl. taxes | Tuta's personal mail and calendar plan: unlimited calendars, calendar sharing, event invitations, offline support and 20 GB of storage. |
| Legend | €8per month, paid yearly (€9.60 paid monthly), incl. taxes | The same calendar features with 500 GB of storage, 30 extra email addresses, 10 custom domains and priority email support. |
| Essential | €6per user / month, paid yearly (€7.20 paid monthly), excl. taxes | Business plan with unlimited calendars, sharing and event invitations, shared mailboxes and 50 GB of storage per user. |
| Advanced | €8per user / month, paid yearly (€9.60 paid monthly), excl. taxes | Business plan with the same calendar features, 500 GB of storage per user, 10 custom domains and priority email support. |
| Unlimited | €12per user / month, paid yearly (€14.40 paid monthly), excl. taxes | Business plan with 1,000 GB of storage per user, unlimited custom domains and custom branding. |
Read from tuta.com on Oct 5, 2026. Prices change, so confirm with Tuta Calendar before you buy.
Ways to pay less
- Annual discountPay yearly and save two months
Tuta's pricing page shows a yearly payment saving €7.20 on the lowest paid plan (€36 instead of €43.20) and €19.20 on Legend (€96 instead of €115.20).
Stated on tuta.com - Nonprofit50% off for nonprofits and schools
Registered nonprofits and schools for general education can apply to Tuta's sales team for a 50% discount on a subscription.
Stated on tuta.com - Other savingsFree for qualifying open source projects
Open source teams can apply by email for a free version of Tuta. Tuta's blog sets out which projects qualify.
Stated on tuta.com
Works with
- Tuta Mail
Tuta Calendar alternatives
- Tuta Calendar vs Proton Calendar
Free plan · from $3.99/mo
- Tuta Calendar vs Google Calendar
Free plan · from $7/mo
- Tuta Calendar vs Zoho Calendar
Free plan · from $1/mo
Common questions
Is Tuta Calendar free?
Tuta Calendar has a free plan. One encrypted calendar and 1 GB of storage, with web, mobile and desktop apps. No calendar sharing, event invitations or offline support. Paid plans start at €3 per month, paid yearly (€3.60 paid monthly).
How much does Tuta Calendar cost?
Tuta Calendar lists 6 plans. Free: €0. Revolutionary: €3 per month, paid yearly (€3.60 paid monthly), incl. taxes. Legend: €8 per month, paid yearly (€9.60 paid monthly), incl. taxes. Essential: €6 per user / month, paid yearly (€7.20 paid monthly), excl. taxes. Advanced: €8 per user / month, paid yearly (€9.60 paid monthly), excl. taxes. Unlimited: €12 per user / month, paid yearly (€14.40 paid monthly), excl. taxes. Prices were read from tuta.com on Oct 5, 2026.
What platforms does Tuta Calendar work on?
Tuta Calendar is available on Web, macOS, Windows, Linux, iOS and Android.
Does Tuta Calendar offer any discounts?
Tuta Calendar publicly lists the following: Pay yearly and save two months; 50% off for nonprofits and schools; Free for qualifying open source projects.
Is Tuta Calendar open source?
Yes. Tuta Calendar is open source, according to its own site.
Is Tuta Calendar end-to-end encrypted?
Tuta Calendar describes itself as end-to-end encrypted on its own site. Nobody here has audited that.
What does Tuta Calendar integrate with?
Tuta Calendar's listing names Tuta Mail. A listing names up to eight integrations, so it may connect to more.
Who makes Tuta Calendar?
Tuta Calendar is made by Tutao GmbH.
What are the alternatives to Tuta Calendar?
The closest alternatives to Tuta Calendar in our directory are Proton Calendar, Google Calendar, Apple Calendar, Zoho Calendar and Fossify Calendar. Each one has a side-by-side comparison with Tuta Calendar.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 5, 2026.