Fastmail vs Yoast

Fastmail (Open-source software developed at Fastmail.) and Yoast (This is where the Yoast.com team shares its public code: from our WordPress plugins to other small projects.) both appear on the Smoower Developer Ecosystem Index.

Yoast (rank #209) holds a modest lead over Fastmail (rank #430) on the overall Smoower ecosystem score (49 vs 40). The gap of 9 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Yoast is clearly ahead of Fastmail. On education (docs, guides and learning material for developers), Yoast is slightly ahead of Fastmail. On community (issue response, PR reviews and discussion health), Yoast is ahead of Fastmail. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of Yoast. On momentum (release cadence and how fast the ecosystem moves), Yoast is slightly 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. Yoast shows 3,439 stars across 78 public repos, 12 active in the last 90 days and 21 external contributors.

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