Fastmail vs Dropbox Sign

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

Fastmail and Dropbox Sign 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), Dropbox Sign is clearly ahead of Fastmail. On education (docs, guides and learning material for developers), Dropbox Sign is ahead of Fastmail. On community (issue response, PR reviews and discussion health), Fastmail is ahead of Dropbox Sign. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of Dropbox Sign. On momentum (release cadence and how fast the ecosystem moves), Fastmail is clearly ahead of Dropbox Sign.

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. Dropbox Sign shows 434 stars across 36 public repos, 9 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 14.6x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting reach. Dropbox Sign 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.