Fastmail vs Personio

Fastmail (Open-source software developed at Fastmail.) and Personio (Personio is the modern all-in-one HR solution made for SMEs. Spend less time on processes and more time on people.) both appear on the Smoower Developer Ecosystem Index.

Fastmail (rank #430) holds a narrow lead over Personio (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), Personio is slightly ahead of Fastmail. On education (docs, guides and learning material for developers), Fastmail is ahead of Personio. On community (issue response, PR reviews and discussion health), Fastmail is ahead of Personio. On reach (how visible the ecosystem is beyond its own repos), Fastmail is ahead of Personio. On momentum (release cadence and how fast the ecosystem moves), Fastmail is clearly ahead of Personio.

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. Personio shows 122 stars across 19 public repos, 0 active in the last 90 days and 1 external contributors. The star gap on its own does not decide the comparison, but Fastmail's footprint is roughly 51.8x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting momentum. Personio 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.