Fastmail vs Sprout Social

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

Sprout Social (rank #401) holds a narrow lead over Fastmail (rank #430) on the overall Smoower ecosystem score (41 vs 40). The gap of 1 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Sprout Social is ahead of Fastmail. On education (docs, guides and learning material for developers), Fastmail is ahead of Sprout Social. On community (issue response, PR reviews and discussion health), Fastmail is ahead of Sprout Social. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of Sprout Social. On momentum (release cadence and how fast the ecosystem moves), Sprout Social is 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. Sprout Social shows 313 stars across 68 public repos, 4 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 20.2x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting reach. Sprout Social looks better where momentum 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.