Fastmail vs Increase

Fastmail (Open-source software developed at Fastmail.) and Increase (Build your bank) both appear on the Smoower Developer Ecosystem Index.

Increase (rank #55) holds a modest lead over Fastmail (rank #430) on the overall Smoower ecosystem score (60 vs 40). The gap of 20 points reflects composite signals across code, docs, community and reach.

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

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. Increase shows 45 stars across 12 public repos, 11 active in the last 90 days and 5 external contributors. The star gap on its own does not decide the comparison, but Fastmail's footprint is roughly 140.4x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting education. Increase looks better where community 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.