Fastmail vs HubSpot

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

HubSpot (rank #93) holds a modest lead over Fastmail (rank #430) on the overall Smoower ecosystem score (56 vs 40). The gap of 16 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), HubSpot is ahead of Fastmail. On education (docs, guides and learning material for developers), Fastmail is ahead of HubSpot. On community (issue response, PR reviews and discussion health), HubSpot is slightly ahead of Fastmail. On reach (how visible the ecosystem is beyond its own repos), HubSpot is ahead of Fastmail. On momentum (release cadence and how fast the ecosystem moves), HubSpot 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. HubSpot shows 53,481 stars across 381 public repos, 35 active in the last 90 days and 4 external contributors. The star gap on its own does not decide the comparison, but HubSpot's footprint is roughly 8.5x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting education. HubSpot 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.