Citadelle is a self-hosted private server focused on the security of your data, built buisnesses who want to keep their data, mail and conversations on a machine they own.

A Citadelle server runs at home and is driven entirely from a single client application, on the web and on mobile.

• Files — browsing, uploads, sharing between members, quotas, image and PDF previews
• Office documents — collaborative editing through Collabora
• Calendar — events, recurrence, reminders
• Messages — real-time chat over WebSocket, groups, replies, reactions, attachments
• Mail — an IMAP/SMTP account with folders, search and drafts
• Video calls — powered by LiveKit
• Accounts — authentication with TOTP and invitation codes, per-module permissions

Citadelle is under active development.