10 Best European Alternatives to Google Calendar (2026), Compared

The best European alternative to Google Calendar is Proton Calendar (Switzerland): it is free to start, has apps for phone and computer, imports your Google calendars with one tool and encrypts every event end to end. If you want a German calendar with the same level of encryption for less, pick Tuta Calendar – free with one calendar, or €3 a month for unlimited calendars and sharing.

I wrote this ranking for people who like what Google Calendar does – a free calendar on every device, invitations, shared family or team calendars – but no longer want their schedule stored by Google. Google’s privacy policy applies to all services offered by Google LLC and its affiliates, including its advertising services; for users in the EEA and Switzerland the data controller is Google Ireland Limited, a subsidiary of the US company. Your calendar shows where you are, who you meet and when – a lot to hand to an advertising business. The European services below make money from subscriptions instead, and several of them cannot read your events at all. I compared eleven calendar services from the EU and Switzerland and kept ten. For each one you get who is behind it, where your events are stored, what it costs, what users say and what you lose compared with Google Calendar.

What are the best European alternatives to Google Calendar?

If you only have a minute: these are the European calendars I would switch to from Google Calendar, in order. Each one is reviewed in detail below.

1. Proton Calendar (Switzerland) – encrypted calendar with apps, Google import and a free plan. Best for most people leaving Google Calendar.
2. Tuta Calendar (Germany) – quantum-safe encrypted calendar, from €3 a month for unlimited calendars. Best for privacy on a budget.
3. Infomaniak kSuite (Switzerland) – a free calendar with 20 GB of mail and cloud storage in the same account. Best free Google-style suite.
4. mailbox.org (Germany) – calendar, contacts, tasks and mail that sync with the apps you already use. Best for keeping your phone’s calendar app.
5. Kolab Now (Switzerland) – groupware on its own Swiss infrastructure with CalDAV and ActiveSync. Best for Outlook and business users.
6. Nextcloud Calendar (Germany) – open-source calendar you run on your own server. Best for full control.
7. Calendar.online (Germany) – shared calendars that work without a login, on German servers. Best for clubs and families.
8. Teamup Calendar (Switzerland) – group scheduling with sub-calendars and access links. Best for teams that share one schedule.
9. Posteo (Germany) – an encrypted CalDAV calendar inside a €1 mailbox. Best cheap private calendar.
10. fruux (Germany) – free CalDAV and CardDAV sync for calendars, contacts and tasks. Best sync backend for Apple and Thunderbird users.

Google Calendar alternatives compared

Prices from public pricing pages. Affiliate links and sponsored placements are labelled.

“Data hosted in” shows where each provider stores your calendar, based on its own statements, a DNS lookup of the app’s domain and an ASN lookup (25 Oct 2026). For Nextcloud it is wherever you or your provider run the server.

How I compared the Google Calendar alternatives

I looked at eleven calendar services from companies based in the EU or Switzerland and kept ten. The order is driven first by how much of Google Calendar you keep after switching, then by privacy and data sovereignty, then by price. Concretely, I weighed five things:

• Feature match with Google Calendar – a free plan, apps for phone and computer, invitations, sharing, multiple calendars and a way to import your Google events.
• Jurisdiction and hosting – where the company is registered and where your events are actually stored, including whether a US cloud is involved.
• Privacy and encryption – whether events are end-to-end encrypted, whether the apps are open source and whether the business model relies on ads.
• Compatibility – CalDAV, ActiveSync or other ways to use the calendar in Apple Calendar, Outlook or Thunderbird.
• Price and user ratings – the cheapest useful paid plan, and ratings on Trustpilot read together with the number of reviews.

I left out Morgen (Switzerland): it is a calendar app that sits on top of Google, Outlook or iCloud calendars, and Morgen says it does not store your events on its servers – so it does not replace Google Calendar, it organises it. It is listed in my overview of European online calendars. All data comes from the providers’ own pricing, about, legal and privacy pages and from Trustpilot, checked on 25 October 2026.

The best European alternatives to Google Calendar, reviewed

Every calendar below gets the same treatment: who is behind it, what users say, what it replaces from Google Calendar and what it does not, its pros and cons, and my opinion on who should switch to it.

1. Proton Calendar

The closest European match for Google Calendar – encrypted events, apps everywhere and a free plan

Proton Calendar is made by Proton AG in Plan-les-Ouates near Geneva, Switzerland. Proton was founded in 2014 by scientists who met at CERN, after a crowdfunding campaign backed by more than 10,000 people, and its primary shareholder is the non-profit Proton Foundation. The calendar web app runs on Proton’s own network (AS62371), and Proton says all user data is protected by Swiss privacy law.

What users say. There is no separate Trustpilot profile for the calendar. The Proton Mail profile, which also collects reviews about the Proton account in general, has 2.1/5 from 1,802 reviews; the complaints are mostly about support and account lockouts. Google Calendar’s own profile has 2.3/5 from only 9 reviews.

What it replaces from Google Calendar – and what it doesn’t. You keep a free calendar with apps for iPhone, Android, Windows, macOS, Linux and the web, invitations sent from your Proton Mail address, several calendars and an import from Google with Proton’s Easy Switch tool. Every event is end-to-end encrypted: title, description, location and participants are encrypted so Proton cannot read them. Paid plans add up to 25 calendars, calendar sharing and a booking page for appointments. What you lose: the free plan has 3 personal calendars, Proton’s calendar page does not mention CalDAV, so you use Proton’s own apps rather than Apple Calendar or Outlook, and you need a Proton account (with a Proton Mail address) to use it.

Facts: HQ Switzerland (Geneva) · founded 2014 · free plan: yes, 3 calendars · Mail Plus $3.99/month billed yearly ($47.88), $4.99 billed monthly – 25 calendars, 1 booking page · Proton Unlimited $9.99/month billed yearly · prices shown in USD, EUR and CHF available · open-source apps with a published audit report.

Switching from Google Calendar: easy – Easy Switch connects to your Google account and imports your calendars, and events are encrypted as they arrive.

My take: Proton Calendar is the easiest way to leave Google Calendar without giving anything important up: the apps are polished, the import is one click and Proton cannot read your schedule. It ranks first because it also replaces Gmail and Drive in the same account. Start free; Mail Plus is worth it if you need sharing or a booking page. Best for: anyone leaving Google who wants the same comfort with real encryption. Not for: people who want to keep their phone's built-in calendar app.

Visit proton.me →

2. Tuta Calendar

A German zero-knowledge calendar with quantum-safe encryption, from €3 a month

Tuta Calendar is made by Tutao GmbH in Hanover, Germany, the company behind Tuta Mail, which started as a secure email service in 2011. The company is represented by Arne Möhle, Hanna Bozakov and Matthias Pfau. The calendar app runs on Tuta’s own network (AS210909) in Germany, not on a US cloud.

What users say. On Trustpilot Tuta has 3.5/5 from 392 reviews, a company-wide profile that mostly covers email. On its own calendar page Tuta quotes users who switched from Google and say they miss nothing; on Trustpilot the complaints are mostly about missing IMAP and lockouts when signing up over a VPN.

What it replaces from Google Calendar – and what it doesn’t. You get a calendar with apps for iPhone, iPad, Android, Windows, macOS, Linux and the browser. Events, invitations and sharing are all end-to-end encrypted, and Tuta calls it the only zero-knowledge calendar with quantum-safe encryption; even push reminders are hidden from your phone’s operating system. On paid plans you can share calendars with family or colleagues as read only, read and write, or write and manage sharing. What you lose: the free plan has one calendar and no sharing, Tuta’s calendar page does not mention CalDAV or a direct Google import (you import calendar files in the settings), and you are tied to Tuta’s apps.

Facts: HQ Germany (Hanover) · started 2011 · free plan: yes, 1 calendar, 1 GB · Revolutionary €3/month billed yearly (unlimited calendars, 20 GB, 3 custom domains) · Legend €8/month billed yearly · monthly billing costs more · prices include VAT · open-source desktop clients.

Switching from Google Calendar: moderate – export your calendars from Google as files and import them in Tuta’s settings; shared calendars need to be set up again.

My take: Tuta Calendar is my pick if privacy is the reason you are leaving Google and you want to pay as little as possible. It encrypts more than almost anyone and runs on Tuta’s own servers in Germany. It sits second because the free plan is thin and moving your Google events takes a few manual steps. Best for: privacy-minded people who are happy with Tuta's own apps. Not for: families who need free shared calendars.

Visit tuta.com →

3. Infomaniak kSuite

A free Swiss suite with calendar, 20 GB of mail and cloud storage – the most Google-like package

Infomaniak Network SA is a Swiss company that says its products are developed and hosted in Switzerland. The free my kSuite account bundles mail, the kDrive cloud, the kMeet video service and a calendar, and Infomaniak runs it on its own network (AS29222).

What users say. Infomaniak has 4.0/5 from 2,069 reviews on Trustpilot, the best score in this list with a large number of reviews. That profile covers all Infomaniak products, from hosting to kSuite, not only the calendar.

What it replaces from Google Calendar – and what it doesn’t. my kSuite is the closest thing to a free Google account in Europe: an email address, 20 GB of mail storage, cloud storage, video calls and a calendar that syncs your meetings and contacts on your devices. The paid my kSuite+ removes the calendar limit and adds 30-day restoration of deleted calendars. What you lose: the free plan has one calendar, events are not end-to-end encrypted, and the calendar is part of a bigger suite rather than a stand-alone app.

Facts: HQ Switzerland · free plan: yes, 1 calendar · my kSuite+ CHF 19/year (shown as from CHF 1.60/month, 2 months free), unlimited calendars · Infomaniak’s site states prices excluding VAT · hosted in Switzerland on Infomaniak’s own network.

Switching from Google Calendar: easy – the suite works like Google’s, and the calendar syncs with your devices.

My take: Infomaniak is the easiest move if you want your calendar, mail and files out of a US company without paying. CHF 19 a year for unlimited calendars is the best deal in this list. It sits behind Proton and Tuta because your events are not end-to-end encrypted. Best for: people who want to replace their whole Google account for free. Not for: privacy purists who want encrypted events.

Visit infomaniak.com →

4. mailbox.org

A German calendar, contacts and tasks service that syncs with the apps already on your phone

mailbox.org is a German email and groupware provider and part of the Heinlein Group. Every plan includes a calendar and address book, tasks, sync with mobile devices and sharing of calendars, contacts and appointments.

What users say. mailbox.org has 4.2/5 from 229 reviews on Trustpilot – the highest score in this list with a meaningful number of reviews. The profile covers the whole service, mostly email.

What it replaces from Google Calendar – and what it doesn’t. Instead of its own calendar app, mailbox.org syncs with the calendar apps you already have on your phone and computer, and you can share calendars and appointments on every plan. The Standard plan adds an office suite, video meetings, 10 GB of cloud storage and family accounts – close to a Google Workspace replacement. What you lose: there is no free plan, only a 30-day free trial, there is no end-to-end encryption for events, and the web interface is functional rather than pretty.

Facts: HQ Germany · part of the Heinlein Group · free plan: no, 30-day free trial · Light €1/month (€12 paid yearly), Standard €3/month billed yearly or €4 monthly, Premium €9/month billed yearly or €12 monthly · calendar, contacts and tasks on every plan · prices include VAT.

Switching from Google Calendar: easy – export your Google calendars, import them, and add the account to the calendar app you already use.

My take: mailbox.org is the best choice if you like the calendar app on your iPhone or Android and just want a European account behind it. It is cheap, well rated and shares calendars on every plan. The missing free plan is what keeps it out of the top three. Best for: people who want to keep their phone's calendar app and drop Google. Not for: anyone who needs a free calendar.

Visit mailbox.org →

5. Kolab Now

Swiss groupware on its own infrastructure – calendar, tasks and files with CalDAV and ActiveSync

Kolab Now is run by Apheleia IT AG in Bern, Switzerland, and has been owned and operated in Switzerland since 2013. Kolab says your data is not in the cloud but on its own infrastructure in Switzerland; the service runs on the network of the Swiss provider NTS workspace AG (AS15576).

What users say. There are no reviews of Kolab Now on Trustpilot yet.

What it replaces from Google Calendar – and what it doesn’t. The full Kolab plan gives you mail, a calendar, tasks and notes, file storage, collaborative document editing and online meeting rooms. You can sync it to your phone or Outlook over ActiveSync or CalDAV and CardDAV, which makes it the most business-friendly option here. What you lose: there is no free plan, the calendar needs the more expensive full Kolab plan, and events are not end-to-end encrypted.

Facts: HQ Switzerland (Bern) · operated since 2013 · free plan: no, first 30 days free · full kolab CHF 9.90/month (calendar, tasks, notes, files, 5 GB) · just email CHF 5/month without the calendar · ActiveSync and CalDAV/CardDAV.

Switching from Google Calendar: easy – import your exported calendars and connect Outlook or your phone over ActiveSync or CalDAV.

My take: Kolab Now is a serious Google Workspace replacement for people who work in Outlook or need ActiveSync. At CHF 9.90 a month it is expensive if you only want a calendar, which is why it sits in the middle of the list. Best for: small businesses that use Outlook and want Swiss hosting. Not for: individuals who only need a calendar.

Visit kolabnow.com →

6. Nextcloud Calendar

The open-source calendar you run on your own server – or with a European provider

Nextcloud Calendar is part of Nextcloud Groupware, built by Nextcloud GmbH, whose official headquarters is in Stuttgart, Germany, with its main office in Berlin. Nextcloud is open-source, self-hosted software: your calendars and contacts are stored on your own infrastructure (or with a hosting provider you choose), without any third party having access.

What users say. Nextcloud has 2.6/5 from 52 reviews on Trustpilot, but that profile covers the company and all its products, not just the calendar.

What it replaces from Google Calendar – and what it doesn’t. Nextcloud gives you a web calendar, contacts and mail integrated with Nextcloud Files, with native integration into iOS, Android, macOS, Windows, Linux, Outlook and Thunderbird. Appointments can create a video room in Nextcloud Talk automatically, and holiday calendars can be added. What you lose: someone has to run the server – you, your IT team or a provider – and the experience depends on how well it is maintained.

Facts: HQ Germany (Stuttgart) · open source · free to self-host · hosting: your own server or a provider of your choice · apps and sync for iOS, Android, desktop, Outlook and Thunderbird · Talk rooms for appointments.

Switching from Google Calendar: moderate – importing calendars is simple, but you first need a Nextcloud server or a provider.

My take: Nextcloud is the sovereignty champion: no one but you holds your calendar. It ranks sixth only because it is software, not a ready-made service – you or a provider must run it. Best for: tech-savvy users and organisations that want full control. Not for: anyone who wants a calendar that just works out of the box.

Visit nextcloud.com →

7. Calendar.online

A free German shared calendar that people can use without creating an account

Calendar.online is run by Kalender.digital GmbH in Düsseldorf, Germany. It says all of its servers are in Germany, and its domain runs on Hetzner’s network (AS24940). It also says it stores IP addresses only anonymously and does not pass on or sell data.

What users say. There are no reviews of Calendar.online on Trustpilot yet.

What it replaces from Google Calendar – and what it doesn’t. Calendar.online is built for groups: one calendar with sub-calendars, access links with read or write rights, unlimited users, a booking link and reminders. People you invite do not need to log in, which is great for clubs, schools and families. It works in the browser and has apps for Android, iOS and macOS, and imports and exports iCalendar files. What you lose: it is not a personal calendar with invitations from your email address, there is no end-to-end encryption, and branding is only removed on Premium.

Facts: HQ Germany (Düsseldorf) · free plan: yes, 6 sub-calendars, 3 access links, unlimited users · Plus $6.90 per calendar per month ($5.52 billed yearly) · Premium $14.90 per calendar per month ($11.92 billed yearly) · prices incl. VAT · servers in Germany.

Switching from Google Calendar: easy – import your events as an iCalendar file and send access links to your group.

My take: Calendar.online solves one Google Calendar job very well: a shared schedule that anyone can open. For a personal calendar with invitations it is the wrong tool, which is why it sits in the lower half. Best for: clubs, schools and families who share one calendar. Not for: people replacing their personal Google Calendar.

Visit calendar.online →

8. Teamup Calendar

A Swiss group calendar for teams – but your data is hosted in the US and Ireland

Teamup Calendar is provided by Teamup Solutions AG in Zurich, Switzerland, and its terms are governed by Swiss law. Its privacy policy says data is hosted in Oregon (United States) and Dublin (Ireland), and the app domain runs on Amazon’s network (AS16509) – so this is a Swiss company that depends on US infrastructure.

What users say. Teamup has 4.0/5 on Trustpilot, but from only 4 reviews. Reviewers praise how easy it is to set up and share, and one says they prefer it to Google Calendar; one complaint is about billing after closing an account, which Teamup says was refunded.

What it replaces from Google Calendar – and what it doesn’t. Teamup is built around one master calendar with colour-coded sub-calendars, custom fields, user access rights and iCal feeds, which suits teams that share one schedule. The free plan allows 5 sub-calendars and 5 users. What you lose: it is not a personal calendar tied to your email, your data sits in the US and Ireland, and single sign-on needs an organisation account.

Facts: HQ Switzerland (Zurich) · free plan: yes, 5 sub-calendars, 5 users, 250 MB · Plus $12/month billed yearly or $15 monthly · Pro $30/month billed yearly · Business $70/month billed yearly · per master calendar · data hosted in the USA and Ireland.

Switching from Google Calendar: moderate – you rebuild your shared calendars as sub-calendars and invite your team.

My take: Teamup is a well-made group calendar from a Swiss company, but it does not solve the sovereignty problem: your data is hosted partly in Oregon. I include it for teams that care most about features and Swiss contracts. Best for: teams that need one shared schedule with access rights. Not for: anyone leaving Google to get their data out of the US.

Visit teamup.com →

9. Posteo

An encrypted CalDAV calendar that comes with a €1 mailbox

Posteo is a German email provider that charges 1 EUR a month for an account and does not collect personal details at sign-up. The calendar is part of every account.

What users say. Posteo has 3.1/5 from 194 reviews on Trustpilot, mostly about the email service.

What it replaces from Google Calendar – and what it doesn’t. You get a web calendar and sync with most smartphones, tablets and computers over CalDAV. Three calendars are included and each extra one costs €0.10 a month. You can encrypt your calendar centrally with AES, protected by your password, so only you can read it. What you lose: there is no free plan and no app of its own, and shared calendars do not work while encryption is on.

Facts: HQ Germany · €1/month for the whole account · free plan: no · 3 calendars included, extra calendars €0.10/month · CalDAV sync · optional AES encryption of the calendar.

Switching from Google Calendar: easy – add Posteo to your phone’s calendar app over CalDAV and import your events.

My take: Posteo is the cheapest honest calendar in this list – one euro a month, and you can lock your calendar with your own password. It is ninth because it is a mailbox first and a calendar second. Best for: people who want a cheap private calendar for their phone's built-in app. Not for: families who want to share encrypted calendars.

Visit posteo.de →

10. fruux

Free CalDAV and CardDAV sync for calendars, contacts and tasks from Münster

fruux is run by fruux GmbH in Münster, Germany, managed by Dominik Tobschall; its copyright line runs from 2007. fruux says your data is encrypted and backed up on servers in Germany, but its domains run on Amazon Web Services (AS16509).

What users say. There are no reviews of fruux on Trustpilot yet.

What it replaces from Google Calendar – and what it doesn’t. fruux is a sync service: it keeps your calendars, contacts and tasks in step across devices using CalDAV and CardDAV, with sharing, free-busy scheduling, delegation and public calendars. Every plan includes unlimited calendars and storage. What you lose: fruux says many of these features need a compatible calendar app – the web app does not support them all yet – and it runs on AWS.

Facts: HQ Germany (Münster) · free plan: yes (Basic, 2 shares, 2 devices) · Pro €4/month or €40/year (unlimited shares, 10 devices) · Team €20/month for 5 members, €4 per extra member · CalDAV and CardDAV · hosted on AWS, servers in Germany per fruux.

Switching from Google Calendar: moderate – you set fruux up in Apple Calendar, Thunderbird or another CalDAV app and import your events there.

My take: fruux does one thing: sync. If you already like Apple Calendar or Thunderbird, it is a cheap German backend. Its weak web app and AWS hosting put it last. Best for: Apple and Thunderbird users who want a German sync backend. Not for: people who want a calendar in the browser.

Visit fruux.com →

What European calendars cost compared with Google Calendar

Google Calendar is free with a Google account, and businesses pay for it through Google Workspace. Most European calendars have a free plan too; the paid plans buy you more calendars, sharing or a whole suite.

Prices as shown on each provider’s pricing page on 25 October 2026, in the currency shown there. Proton showed USD with EUR and CHF available; Infomaniak states its prices excluding VAT.

How to switch from Google Calendar to a European calendar

1. Export your calendars from Google. In Google Calendar’s settings, use the export option to download your calendars as iCalendar files – or use Proton’s Easy Switch, which connects to Google directly.
2. Import them into the new calendar. Every service in this list accepts calendar files; import each calendar separately so colours and sharing stay clear.
3. Set up your devices. Install the provider’s app, or add the account to your phone’s calendar app if it supports CalDAV or ActiveSync.
4. Re-share family and team calendars. Shared calendars do not move with the export – invite people again in the new service.
5. Keep Google for a few weeks. Existing invitations still point to your Google address; delete the Google calendars once new invitations arrive in the new one.

Google Calendar alternatives: FAQ

My verdict: which European calendar to switch to

Most people leaving Google Calendar should go to Proton Calendar: the apps are as easy as Google’s, Easy Switch imports your events, and Proton cannot read them. If privacy is the reason and you want to pay little, choose Tuta Calendar – €3 a month for unlimited encrypted calendars. If you want your whole Google account replaced for free, take Infomaniak kSuite, and if you want to keep the calendar app on your phone, mailbox.org or Posteo give you a European account behind it.

For shared schedules, Calendar.online is the simplest choice for clubs and families, and Nextcloud is the answer if you want no one but yourself to hold your calendar. Whatever you pick, export from Google first and keep the old calendar running for a few weeks while invitations catch up.