Fastmail vs Xero Developer API

Fastmail (Open-source software developed at Fastmail.) and Xero Developer API (Xero Developer: Powering Your Innovation and Growth. Check out our SDKs and code samples to get started with your integration.) both appear on the Smoower Developer Ecosystem Index.

Xero Developer API (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), Xero Developer API is clearly ahead of Fastmail. On education (docs, guides and learning material for developers), Xero Developer API is ahead of Fastmail. On community (issue response, PR reviews and discussion health), Xero Developer API is clearly ahead of Fastmail. On reach (how visible the ecosystem is beyond its own repos), Fastmail is clearly ahead of Xero Developer API. On momentum (release cadence and how fast the ecosystem moves), Fastmail is clearly ahead of Xero Developer API.

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. Xero Developer API shows 2,233 stars across 70 public repos, 11 active in the last 90 days and 37 external contributors.

Fastmail is the stronger read for anyone weighting reach. Xero Developer API 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.