Fastmail vs UptimeRobot

Fastmail (Open-source software developed at Fastmail.) and UptimeRobot (Leading Uptime Monitoring Service) both appear on the Smoower Developer Ecosystem Index.

Fastmail (rank #430) holds a narrow lead over UptimeRobot (rank #510) on the overall Smoower ecosystem score (40 vs 37). The gap of 3 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), UptimeRobot is slightly ahead of Fastmail. On education (docs, guides and learning material for developers), Fastmail is slightly ahead of UptimeRobot. On community (issue response, PR reviews and discussion health), UptimeRobot is slightly ahead of Fastmail. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of UptimeRobot. On momentum (release cadence and how fast the ecosystem moves), UptimeRobot is slightly 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. UptimeRobot shows 81 stars across 9 public repos, 6 active in the last 90 days and 10 external contributors. The star gap on its own does not decide the comparison, but Fastmail's footprint is roughly 78.0x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting reach. UptimeRobot 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.