Fastmail vs Segment

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

Segment (rank #103) holds a modest lead over Fastmail (rank #430) on the overall Smoower ecosystem score (55 vs 40). The gap of 15 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Segment is clearly ahead of Fastmail. On education (docs, guides and learning material for developers), Segment is slightly ahead of Fastmail. On community (issue response, PR reviews and discussion health), Segment is clearly ahead of Fastmail. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of Segment. On momentum (release cadence and how fast the ecosystem moves), Segment 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. Segment shows 58,406 stars across 421 public repos, 53 active in the last 90 days and 12 external contributors. The star gap on its own does not decide the comparison, but Segment's footprint is roughly 9.2x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting reach. Segment looks better where community 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.