Your schedule is worth protecting
Keep your schedule private in a secure calendar app, because your life is your business.
Need a secure calendar for work? Discover Proton for Business
Accounts
>100 million
- App rating4.54.5
- Swiss-based
The world’s largest encrypted calendar service
Free calendar
Everyone has the right to privacy, which is why we offer Proton Calendar, a free calendar app designed to protect your personal information. To access more features and support our fight for a better internet, upgrade to a paid account.
Your data, your rules
Proton Calendar is an online calendar and prioritizes users over advertisers.. Your data belongs to you, and our encryption ensures that.
Swiss privacy
Proton is incorporated and headquartered in Switzerland. This means all user data is protected by strict Swiss privacy laws and Swiss neutrality.
Make every day safer with end-to-end encryption
Proton Calendar automatically secures all your events with end-to-end encryption. Events received from people who use other calendars are secured with zero-knowledge encryption.
In both cases, event details, including the title, description, location, and people invited, are encrypted so not even we can see them.
Proton Calendar helps you make the most of your day
Get more from Proton Calendar when you use Proton Mail
Proton Calendar comes with a Proton Mail email address that you can use to securely send event invites. You can also add events to Proton Calendar directly from your Proton Mail inbox.
Proton Calendar helps you make the most of your day
All the features you expect, plus privacy
Proton Calendar was built by the team behind Proton Mail, the world’s largest encrypted email service
Over 70 million people and some of the world’s largest organizations have signed up with Proton.
One account for all your Proton services
Choose an internet where your privacy comes first.
Create a Proton account to get free access to all Proton services, including Proton Calendar, our secure calendar app, along with our encrypted email, cloud storage, VPN(new window), and password manager.
Protect your communications with user-friendly encrypted email.
Save time scheduling and stay organized with shared calendars for you and your family.
Collaborate securely, share large files, and back up your data automatically.
High-speed VPN that allows you to bypass censorship and other content restrictions.
Securely store, share, and auto-login to your accounts using end-to-end encryption.
Choose a wallet that’s transparent, open source, and puts you in control.