CardDAV services

CardDAV hosting providers.

Major Providers

• Google Contacts — CardDAV access for Google accounts.
• Apple iCloud — CardDAV sync for Apple Contacts.
• Fastmail — CardDAV address book hosting.
• Nextcloud — Self-hosted with CardDAV.

Self-Hosted

• Radicale — Lightweight server.
• Baikal — PHP-based.
• SOGo — Scalable groupware.