Fastmail vs Nulab Inc

Fastmail (Open-source software developed at Fastmail.) and Nulab Inc (We are a small company with a big heart and all of our products are handcrafted with love.) both appear on the Smoower Developer Ecosystem Index.

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

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. Nulab Inc shows 1,860 stars across 87 public repos, 6 active in the last 90 days and 12 external contributors. The star gap on its own does not decide the comparison, but Fastmail's footprint is roughly 3.4x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting reach. Nulab Inc 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.