Fastmail vs Kandji

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

Fastmail (rank #430) holds a modest lead over Kandji (rank #728) on the overall Smoower ecosystem score (40 vs 30). The gap of 10 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Kandji is ahead of Fastmail. On education (docs, guides and learning material for developers), Fastmail is clearly ahead of Kandji. On community (issue response, PR reviews and discussion health), Fastmail is slightly ahead of Kandji. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of Kandji. On momentum (release cadence and how fast the ecosystem moves), Kandji is slightly 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. Kandji shows 387 stars across 7 public repos, 6 active in the last 90 days and 3 external contributors. The star gap on its own does not decide the comparison, but Fastmail's footprint is roughly 16.3x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting reach. Kandji 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.