Fastmail vs Engineering at Fullstory

Fastmail (Open-source software developed at Fastmail.) and Engineering at Fullstory (Fullstory APIs and Open-Source Projects) both appear on the Smoower Developer Ecosystem Index.

Fastmail (rank #430) holds a narrow lead over Engineering at Fullstory (rank #625) on the overall Smoower ecosystem score (40 vs 33). The gap of 7 points reflects composite signals across code, docs, community and reach.

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

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. Engineering at Fullstory shows 19,439 stars across 63 public repos, 19 active in the last 90 days and 15 external contributors. The star gap on its own does not decide the comparison, but Engineering at Fullstory's footprint is roughly 3.1x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting reach. Engineering at Fullstory 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.