Aircall vs Fastmail

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

Fastmail (rank #430) holds a narrow lead over Aircall (rank #485) on the overall Smoower ecosystem score (40 vs 38). The gap of 2 points reflects composite signals across code, docs, community and reach.

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

Aircall carries 156 GitHub stars across 28 public repos, with 1 repositories active in the last 90 days and 1 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 40.5x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Aircall is worth a look for teams already invested in its stack. Fastmail 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.