Fastmail vs Skyscanner

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

Skyscanner (rank #209) holds a modest lead over Fastmail (rank #430) on the overall Smoower ecosystem score (49 vs 40). The gap of 9 points reflects composite signals across code, docs, community and reach.

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

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. Skyscanner shows 8,167 stars across 86 public repos, 18 active in the last 90 days and 39 external contributors.

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