Fastmail vs UXPin

Fastmail (Open-source software developed at Fastmail.) and UXPin (The Full-Stack UX Design Platform) both appear on the Smoower Developer Ecosystem Index.

Fastmail (rank #430) holds a narrow lead over UXPin (rank #569) on the overall Smoower ecosystem score (40 vs 35). The gap of 5 points reflects composite signals across code, docs, community and reach.

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

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. UXPin shows 879 stars across 25 public repos, 3 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 7.2x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting reach. UXPin makes more sense for teams already using its adjacent tools. The table below breaks the scores down pillar by pillar; the linked profiles cover the underlying repos, docs and community signals in full.