BaikalBaïkal is a Calendar+Contacts server

Baikal

Baïkal is an open-source CalDAV and CardDAV server that enables you to host your own calendar and contacts infrastructure. It provides a self-hosted alternative to centralized services, giving you complete control over your scheduling and contact data.

Key Features

• CalDAV Support: Full Calendar server implementation for managing events and scheduling across multiple clients
• CardDAV Support: Complete Contacts server with address book synchronization across devices
• Multi-client Compatibility: Works with Thunderbird, Android, iOS, DavX5, and other standard-compliant clients
• Calendar Sharing: Built-in capabilities for sharing calendars with other users
• PHP-based: Lightweight server implementation with minimal resource requirements

Use Cases

• Privacy-focused Teams: Organizations wanting to maintain complete control over calendar and contact data without relying on third-party services
• Decentralized Environments: Small to medium deployments seeking self-hosted synchronization solutions for distributed teams
• Legacy System Integration: Environments where CalDAV and CardDAV standards integration is required with existing infrastructure

Who Is It For

Baïkal is ideal for self-hosted server administrators, small organizations, and individuals who prioritize data privacy and want to avoid commercial cloud providers. It suits users comfortable managing their own infrastructure and those needing standards-based calendar and contact synchronization.