Fastmail vs GoCardless

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

GoCardless (rank #372) holds a narrow lead over Fastmail (rank #430) on the overall Smoower ecosystem score (42 vs 40). The gap of 2 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), GoCardless is ahead of Fastmail. On education (docs, guides and learning material for developers), Fastmail is ahead of GoCardless. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of GoCardless. On momentum (release cadence and how fast the ecosystem moves), GoCardless 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. GoCardless shows 6,977 stars across 161 public repos, 19 active in the last 90 days and 3 external contributors.

Fastmail is the stronger read for anyone weighting reach. GoCardless looks better where momentum 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.