beehiiv vs Fastmail

beehiiv (Next-gen newsletter platform on a mission to help creators and businesses seamlessly create, monetize, and grow their audiences.) and Fastmail (Open-source software developed at Fastmail.) both appear on the Smoower Developer Ecosystem Index.

Fastmail (rank #430) holds a narrow lead over beehiiv (rank #510) on the overall Smoower ecosystem score (40 vs 37). The gap of 3 points reflects composite signals across code, docs, community and reach.

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

beehiiv carries 33 GitHub stars across 13 public repos, with 4 repositories active in the last 90 days and 3 external contributors on record. Fastmail shows 6,316 stars across 38 public repos, 12 active in the last 90 days and 2 external contributors. The star gap on its own does not decide the comparison, but Fastmail's footprint is roughly 191.4x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

beehiiv is the stronger read for anyone weighting code quality. Fastmail looks better where reach 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.