Citadel

Groupware including email, calendar/scheduling, address books, forums, mailing lists, IM, wiki and blog engines, RSS aggregation and more.

Unknown No repository activity data available

WebsiteSource code

At a glance

GitHub stars
–
Last commit
–
Latest release
–
Commits (12 mo)
–
Releases (12 mo)
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License
GPL-3.0
Language / platform
C, Docker, Shell

Maintenance health: Unknown

No repository activity data: the source is not on GitHub or another forge we can query.

How we label health: Active = last commit within 90 days, Maintained = within 12 months, Slowing = 12–24 months, Stale = over 24 months, Archived = read-only repository, Unknown = no data. This project is not hosted on a forge we can query automatically.

Run Citadel yourself

  • RAM: ~4 GB server (2 vCPU)
  • Docker: yes
  • Storage: plan disk for your data (media/files grow fast); attach a volume or use object storage.

Estimated monthly server cost

ProviderPlan size~ USD / month
Vultr4 GB$20Deploy →
DigitalOcean4 GB$24Deploy →
Akamai (Linode)4 GB$24Deploy →

Rough estimate from the app's stack and category, not a benchmark. Several light apps can share one server. Some hosting links may be affiliate links. We may earn a commission at no extra cost to you; it never affects which apps we list.

Prefer managed hosting? Check PikaPods or Elestio.

Citadel is an alternative to

Microsoft 365Google WorkspaceNextcloud

Related self-hosted apps

Apps that share the most categories with Citadel.

Nextcloud

Access and share your files, calendars, contacts, mail and more from any device, on your terms.

Active ★ 37.5k AGPL-3.0 ~$10/mo

Seafile

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SOGo

SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface.

Active ★ 2.2k LGPL-2.1 ~$20/mo

Sync-in

File storage, syncing, sharing, and collaboration with real-time editing, permission management, and desktop/CLI clients.

Active ★ 2k AGPL-3.0 🐳 Docker~$20/mo

bewCloud

File sharing + sync, notes, and photos (alternative to Nextcloud and ownCloud's RSS reader).

Active ★ 1.3k AGPL-3.0 🐳 Docker~$20/mo

Colanode

Collaboration suite with real-time messaging, rich text pages, file management, and dynamic databases - built for offline work (alternative to Slack, Notion).

Maintained ★ 5.2k Apache-2.0 🐳 Docker~$20/mo

Is this your project? Get it featured or send a correction upstream to awesome-selfhosted-data.