Fastmail vs MercadoLibre

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

Fastmail (rank #430) holds a modest lead over MercadoLibre (rank #693) on the overall Smoower ecosystem score (40 vs 31). The gap of 9 points reflects composite signals across code, docs, community and reach.

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

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. MercadoLibre shows 1,621 stars across 101 public repos, 1 active in the last 90 days and 0 external contributors. The star gap on its own does not decide the comparison, but Fastmail's footprint is roughly 3.9x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fastmail is the stronger read for anyone weighting momentum. MercadoLibre 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.