#1 AIFree
egroupware — alternative #1 to Citadel
Software suite including calendars, address books, notepad, project management tools, client relationship management tools (CRM), knowledge...
Catalogue source
Recorded alternatives
Alternatives to Citadel
Every candidate below sits in AI. What ends up on this page is decided entirely by a recorded score — not by bidding, not by editor taste. Review both records, check current vendor terms, then decide.
#2 AIFree
Syncloud — alternative #2 to Citadel
Your own online file storage, social network or email server. (Source Code) GPL-3.0 Go/Shell
Catalogue source
#3 AIFree
Zimbra Collaboration — alternative #3 to Citadel
Email, calendar, collaboration server with Web interface and lots of integrations. (Source Code) GPL-2.0/CPAL-1.0 Java
Catalogue source
#4 AIFree
Traggo — alternative #4 to Citadel
Traggo is a tag-based time tracking tool. In Traggo there are no tasks, only tagged time spans. (Source Code) GPL-3.0 Docker/Go
Catalogue source
Questions about this page
How were these alternatives selected?
Each candidate is a live catalogue record in the same primary category, picked by a deterministic score that Oryxen records in its catalogue: how many meaningful words the two listings share, whether their pricing classes oppose (a paid product against a free one), whether both are open source, and whether either record is featured. The same catalogue state always produces the same list — no randomness, no manual ranking.
Are these alternatives ranked by payment?
No. Rows are ordered only by the recorded score, highest first, with alphabetical ties — payment never influences the order, nothing here is paid placement, and Oryxen charges no listing or placement fee.
Always verify current terms with Citadel directly — Oryxen records pricing classes, not live quotes.