ClickUp vs Fastmail

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

Fastmail (rank #430) holds a narrow lead over ClickUp (rank #602) on the overall Smoower ecosystem score (40 vs 34). The gap of 6 points reflects composite signals across code, docs, community and reach.

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

ClickUp carries 7 GitHub stars across 5 public repos, with 1 repositories active in the last 90 days and 0 external contributors on record. Fastmail shows 6,316 stars across 38 public repos, 12 active in the last 90 days and 2 external contributors. The star gap on its own does not decide the comparison, but Fastmail's footprint is roughly 902.3x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

ClickUp is the stronger read for anyone weighting education. Fastmail looks better where reach 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.