Fastmail vs Stripe

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

Stripe (rank #1) holds a meaningful lead over Fastmail (rank #430) on the overall Smoower ecosystem score (76 vs 40). The gap of 36 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Stripe is clearly ahead of Fastmail. On education (docs, guides and learning material for developers), Stripe is ahead of Fastmail. On community (issue response, PR reviews and discussion health), Stripe is clearly ahead of Fastmail. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of Stripe. On momentum (release cadence and how fast the ecosystem moves), Stripe is clearly 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. Stripe shows 44,519 stars across 97 public repos, 64 active in the last 90 days and 124 external contributors. The star gap on its own does not decide the comparison, but Stripe's footprint is roughly 7.0x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

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