Fastmail vs Pinterest

Fastmail (Open-source software developed at Fastmail.) and Pinterest (Pinterest's Open Source Projects) both appear on the Smoower Developer Ecosystem Index.

Fastmail and Pinterest sit at essentially the same overall ecosystem score (40), which is unusual and worth reading through the pillars below.

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

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. Pinterest shows 30,737 stars across 98 public repos, 37 active in the last 90 days and 22 external contributors. The star gap on its own does not decide the comparison, but Pinterest's footprint is roughly 4.9x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

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