Fastmail vs Zendesk

Fastmail (Open-source software developed at Fastmail.) and Zendesk both appear on the Smoower Developer Ecosystem Index.

Zendesk (rank #165) holds a modest lead over Fastmail (rank #430) on the overall Smoower ecosystem score (51 vs 40). The gap of 11 points reflects composite signals across code, docs, community and reach.

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

Fastmail carries 6,316 GitHub stars across 38 public repos, with 12 repositories active in the last 90 days and 2 external contributors on record. Zendesk shows 12,427 stars across 891 public repos, 87 active in the last 90 days and 10 external contributors.

Fastmail is the stronger read for anyone weighting reach. Zendesk looks better where code quality 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.