Fastmail vs Zapier

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

Zapier (rank #27) holds a meaningful lead over Fastmail (rank #430) on the overall Smoower ecosystem score (64 vs 40). The gap of 24 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Zapier is clearly ahead of Fastmail. On education (docs, guides and learning material for developers), Zapier is slightly ahead of Fastmail. On community (issue response, PR reviews and discussion health), Zapier is slightly ahead of Fastmail. On reach (how visible the ecosystem is beyond its own repos), Fastmail is ahead of Zapier. On momentum (release cadence and how fast the ecosystem moves), Zapier 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. Zapier shows 6,768 stars across 296 public repos, 13 active in the last 90 days and 23 external contributors.

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