Fastmail vs draw.io

Fastmail (Open-source software developed at Fastmail.) and draw.io (draw.io specialises in browser-based diagramming components and applications.) both appear on the Smoower Developer Ecosystem Index.

draw.io (rank #338) holds a narrow lead over Fastmail (rank #430) on the overall Smoower ecosystem score (43 vs 40). 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), draw.io is slightly ahead of Fastmail. On education (docs, guides and learning material for developers), Fastmail is slightly ahead of draw.io. On community (issue response, PR reviews and discussion health), draw.io is ahead of Fastmail. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of draw.io. On momentum (release cadence and how fast the ecosystem moves), Fastmail is slightly ahead of draw.io.

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. draw.io shows 86,983 stars across 32 public repos, 12 active in the last 90 days and 13 external contributors. The star gap on its own does not decide the comparison, but draw.io's footprint is roughly 13.8x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting reach. draw.io 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.