Fastmail vs Tealium Inc.

Fastmail (Open-source software developed at Fastmail.) and Tealium Inc. (Tealium is the data hub for digital business.) both appear on the Smoower Developer Ecosystem Index.

Fastmail and Tealium Inc. sit at essentially the same overall ecosystem score (40), which is unusual and worth reading through the pillars below.

On code quality (the state of repositories, tests, releases and polish), Fastmail is slightly ahead of Tealium Inc.. On education (docs, guides and learning material for developers), Fastmail is clearly ahead of Tealium Inc.. On community (issue response, PR reviews and discussion health), Tealium Inc. is clearly ahead of Fastmail. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of Tealium Inc.. On momentum (release cadence and how fast the ecosystem moves), Tealium Inc. 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. Tealium Inc. shows 212 stars across 130 public repos, 13 active in the last 90 days and 6 external contributors. The star gap on its own does not decide the comparison, but Fastmail's footprint is roughly 29.8x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

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