Zammad vs Zulip

Zammad and Zulip (Organized team chat) both appear on the Smoower Developer Ecosystem Index.

Zammad (rank #152) holds a modest lead over Zulip (rank #536) on the overall Smoower ecosystem score (52 vs 36). The gap of 16 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Zulip is slightly ahead of Zammad. On education (docs, guides and learning material for developers), Zammad is clearly ahead of Zulip. On community (issue response, PR reviews and discussion health), Zammad is clearly ahead of Zulip. On reach (how visible the ecosystem is beyond its own repos), Zulip is clearly ahead of Zammad. On momentum (release cadence and how fast the ecosystem moves), Zammad is slightly ahead of Zulip.

Zammad carries 6,394 GitHub stars across 11 public repos, with 9 repositories active in the last 90 days and 27 external contributors on record. Zulip shows 32,299 stars across 67 public repos, 9 active in the last 90 days and 76 external contributors. The star gap on its own does not decide the comparison, but Zulip's footprint is roughly 5.1x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Zammad is the stronger read for anyone weighting community. Zulip looks better where reach is the deciding factor. The table below breaks the scores down pillar by pillar; the linked profiles cover the underlying repos, docs and community signals in full.