New Calendar Integrations: Proton Calendar & ICS/Webcal Support

February 2, 2026

We've added two highly requested calendar integrations to expand your availability checking options.

What's new:

1. Proton Calendar Integration

Now you can connect your Proton Calendar directly for availability checking. We've heard your requests for more privacy-focused calendar options, and Proton Calendar is now fully supported.

2. Universal ICS/Webcal Support

You can also connect any calendar that provides an ICS or webcal feed URL. This opens up support for numerous calendar services, including:

  • Self-hosted calendars (Nextcloud, Radicale, etc.)
  • GMX Calendar
  • Zimbra
  • Fastmail
  • IONOS
  • Any other service that exports ICS/webcal feeds

Simply provide your calendar's ICS or webcal URL, and we'll automatically check your availability.

Why this matters:

While we still support all major calendar providers like Google Calendar, Apple iCloud, Microsoft 365, and Exchange Server, you now have even more flexibility. Whether you prioritize privacy with Proton, run your own calendar server, or use a specialized service, Zeeg works with your setup. Your availability checking adapts to your tools, not the other way around.

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