Open Source Alternatives to Google Calendar

Google Calendar is a widely used time-management and scheduling application developed by Google. It allows users to organize their daily lives, coordinate meetings, and track important events across all their devices. Key features include the ability to create customized events, set recurring reminders, and manage to-do lists through seamless integration with Google Tasks. Users can color-code their schedules, share calendars with family or colleagues, and automatically import events like flight or hotel reservations directly from Gmail.

Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to Google Calendar give you an option you fully own. You can self-host them, so your data stays on infrastructure you control. This page lists 2 open source alternatives to Google Calendar. The most popular are Radicale and Baïkal. Most use the GPL-3.0 license, and 2 offer an official Docker image.