Replaces

Looking for an alternative to Google Calendar?

Every ALT-TECH entry that replaces this.

Encrypted storage, calendar and chat you can run yourself

Platforms

Web
Self-hosted
Linux

Open source

EU EUROPE

An encrypted calendar inside the Tuta mailbox

Platforms

Web
Android
iOS
Windows
macOS
Linux

Open source

A long-established independent mail and calendar host

Platforms

Windows
macOS
Linux
Android
iOS
Web

Proprietary

EUROPE

End-to-end encrypted calendar and contact sync

Platforms

Windows
macOS
Linux
Android
iOS
Web
Self-hosted

Open source

Verified
Free EU EUROPE

Safe home for all your data

Platforms

macOS
Browser extension
Linux
Android
Windows
iOS
Web
Self-hosted

Open source