Proton Calendar

Proton Calendar offers a secure way to manage your schedule, ensuring your life remains your business. Your data belongs to you, not advertisers, thanks to robust encryption. Based in Switzerland, all user data is protected by strict Swiss privacy laws. This online calendar automatically secures all your events with end-to-end encryption, and events from other calendars are protected with zero-knowledge encryption. This means event details like title, description, location, and invitees are unreadable even by Proton.

Key features include:

• Free access: A free calendar app is available for everyone, with paid options for more features.
• Seamless integration: Works with Proton Mail for sending secure event invites and adding events from your inbox.
• Efficient scheduling: Quickly add events, modify invitations, and set multiple reminders.
• Privacy by default: Combines traditional calendar functionality with strong privacy measures.

Built by the team behind Proton Mail, the world’s largest encrypted email service, Proton Calendar is part of a suite of privacy-focused services trusted by over 100 million users.