Fastmail vs InVision

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

Fastmail and InVision sit at essentially the same overall ecosystem score (40), which is unusual and worth reading through the pillars below.

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

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. InVision shows 1,303 stars across 114 public repos, 0 active in the last 90 days and 0 external contributors. The star gap on its own does not decide the comparison, but Fastmail's footprint is roughly 4.8x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting momentum. InVision looks better where education 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.